no need for the padding or the corners.

here&#39;s a sample:

    &lt;shape xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot; android:shape=&quot;oval&quot; &gt;
        &lt;gradient android:startColor=&quot;#FFFF0000&quot; android:endColor=&quot;#80FF00FF&quot;
            android:angle=&quot;270&quot;/&gt;
    &lt;/shape&gt;

based on : 

https://stackoverflow.com/a/10104037/878126

&gt; **Possible Duplicate:**  
&gt; [Automatically Delete Files/Folders in R](https://stackoverflow.com/questions/9296377/automatically-delete-files-folders-in-r)  

&lt;!-- End of automatically inserted text --&gt;

I would like to know if there is a way in R to check up if a file is in my current directory, and if it is there then the program deletes it?

I know that other languages have direct access to OS functions to do this task, but I am a little bit dubious if R has that capability.

how to delete a file with R?

Consider a class `X` with `N` member variables, each of some *copiable* and *movable* type, and `N` corresponding setter functions. 
In C++98, the definition of `X` would likely look something like this:

    class X
    {
    public:
        void set_a(A const&amp; a) { _a = a; }
        void set_b(B const&amp; b) { _b = b; }
        ...
    private:
        A _a;
        B _b;
        ...
    };

Setter functions of class `X` above can bind both to lvalue and to rvalue arguments. Depending on the actual argument, this *might* result in the creation of a temporary and *will* eventually result in a copy assignment; due to this, *non-copiable* types are not supported by this design.

With C++11 we have move semantics, perfect forwarding, and universal references (Scott Meyers&#39;s terminology), which allow for a more efficient and generalized use of setter functions by rewriting them this way:

    class X
    {
    public:
        template&lt;typename T&gt;
        void set_a(T&amp;&amp; a) { _a = std::forward&lt;T&gt;(a); }

        template&lt;typename T&gt;
        void set_b(T&amp;&amp; b) { _b = std::forward&lt;T&gt;(b); }
        ...
    private:
        A _a;
        B _b;
        ...
    };

Universal references can bind to `const`/non-`const`, `volatile`/non-`volatile`, and to any convertible type in general, avoiding the creation of temporaries and passing values straight to `operator =`. *Non-copiable*, *movable* types are now supported. Possibly undesired bindings can be eliminated either through `static_assert` or through `std::enable_if`.

So my question is: as a *design guideline*, should all (let&#39;s say, most) setter functions in C++11 be written as function templates accepting universal references?

Apart from the more cumbersome syntax and the impossibility of using Intellisense-like helper tools when writing code in those setter functions, are there any relevant disadvantages with the hypothetical principle &quot;*write setter functions as function templates accepting universal references whenever possible*&quot;?

Should all/most setter functions in C++11 be written as function templates accepting universal references?

I&#39;m trying to draw circle with the help of XML file in android, but circle is not displaying properly. Below code is showing Oval. How can I create circle in XML file.

    &lt;shape xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        android:shape=&quot;oval&quot;&gt; 
        &lt;gradient
            android:startColor=&quot;#FFFF0000&quot;
            android:endColor=&quot;#80FF00FF&quot;
            android:angle=&quot;45&quot;/&gt;
        &lt;padding android:left=&quot;2dp&quot;
            android:top=&quot;2dp&quot;
            android:right=&quot;2dp&quot;
            android:bottom=&quot;2dp&quot; /&gt;
        &lt;corners android:radius=&quot;10dip&quot; /&gt;
    
    &lt;/shape&gt;

Any help would be appreciable.

How can I draw circle through XML Drawable - Android?

I'm trying to draw circle with the help of XML file in android, but circle is not displaying properly. Below code is showing Oval. How can I create circle in XML file.
<pre><code class="hljs language-ini">&#x3C;shape xmlns:android="http://schemas.android.com/apk/res/android"
 android:shape="oval"> 
 &#x3C;gradient
 android:startColor="#FFFF0000"
 android:endColor="#80FF00FF"
 android:angle="45"/>
 &#x3C;padding android:left="2dp"
 android:top="2dp"
 android:right="2dp"
 android:bottom="2dp" />
 &#x3C;corners android:radius="10dip" />

&#x3C;/shape>
</code></pre>
Any help would be appreciable.

I want to define a min and max value for an `EditText`. 

For example: if any person tries to enter a month value in it, the value must be between 1-12.

I can do it by using `TextWatcher` but I want to know if there is any other way to do it in layout file or elsewhere.

Edit:
I don&#39;t want to limit character count. I want to limit the value. For example, if I limit month `EditText` w characters when I enter 12 it will accept it but if I enter 22 it mustn&#39;t accept it while I am entering.


Is there a way to define a min and max value for EditText in Android?

How to I make the markers in Android Google Maps API v2 become clickable so they will either bring up a menu with options or just start a new activity? I believe I made the markers in my app currently in a &quot;newb&quot; method. I didn&#39;t assign them a name or a method to be able to link it in with the rest of the required code.
 
    googleMap.addMarker(new MarkerOptions()
            .position(latLng)
            .title(&quot;My Spot&quot;)
            .snippet(&quot;This is my spot!&quot;)
            .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));


If you ANSWER this, please include a sample code of a marker being introduced with a unique name and then being set as clickable to open a new activity.

Google Maps API v2: How to make markers clickable?

I want to discover `bluetooth` devices in range, list and pair to them on click. I used following code but its just closing application when I click on device name which I want to pair.

I want to know mistake in my code or any other way to do what i need.

    

    package com.marakana;
    
        import java.util.Set;
    
        import android.app.Activity;
        import android.bluetooth.BluetoothAdapter;
        import android.bluetooth.BluetoothDevice;
        import android.content.BroadcastReceiver;
        import android.content.Context;
        import android.content.Intent;
        import android.content.IntentFilter;
        import android.os.Bundle;
        import android.util.Log;
        import android.view.View;
        import android.view.Window;
        import android.view.View.OnClickListener;
        import android.widget.AdapterView;
        import android.widget.ArrayAdapter;
        import android.widget.Button;
        import android.widget.ListView;
        import android.widget.TextView;
        import android.widget.AdapterView.OnItemClickListener;
    
     
        public class BluetoothDemo extends Activity {
        // Debugging
        private static final String TAG = &quot;DeviceListActivity&quot;;
        private static final boolean D = true;
    
        // Return Intent extra
        public static String EXTRA_DEVICE_ADDRESS = &quot;device_address&quot;;
    
        // Member fields
        private BluetoothAdapter mBtAdapter;
        private ArrayAdapter&lt;String&gt; mPairedDevicesArrayAdapter;
        private ArrayAdapter&lt;String&gt; mNewDevicesArrayAdapter;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
    
            // Setup the window
            requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
            setContentView(R.layout.device_list);
    
            // Set result CANCELED incase the user backs out
            setResult(Activity.RESULT_CANCELED);
    
            // Initialize the button to perform device discovery
            Button scanButton = (Button) findViewById(R.id.button_scan);
            scanButton.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {
                    doDiscovery();
                    v.setVisibility(View.GONE);
                }
            });
    
            // Initialize array adapters. One for already paired devices and
            // one for newly discovered devices
            mPairedDevicesArrayAdapter = new ArrayAdapter&lt;String&gt;(this, R.layout.device_name);
            mNewDevicesArrayAdapter = new ArrayAdapter&lt;String&gt;(this, R.layout.device_name);
    
            // Find and set up the ListView for paired devices
            ListView pairedListView = (ListView) findViewById(R.id.paired_devices);
            pairedListView.setAdapter(mPairedDevicesArrayAdapter);
            pairedListView.setOnItemClickListener(mDeviceClickListener);
    
            // Find and set up the ListView for newly discovered devices
            ListView newDevicesListView = (ListView) findViewById(R.id.new_devices);
            newDevicesListView.setAdapter(mNewDevicesArrayAdapter);
            newDevicesListView.setOnItemClickListener(mDeviceClickListener);
    
            // Register for broadcasts when a device is discovered
            IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
            this.registerReceiver(mReceiver, filter);
    
            // Register for broadcasts when discovery has finished
            filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
            this.registerReceiver(mReceiver, filter);
    
            // Get the local Bluetooth adapter
            mBtAdapter = BluetoothAdapter.getDefaultAdapter();
    
            // Get a set of currently paired devices
            Set&lt;BluetoothDevice&gt; pairedDevices = mBtAdapter.getBondedDevices();
    
            // If there are paired devices, add each one to the ArrayAdapter
            if (pairedDevices.size() &gt; 0) {
                findViewById(R.id.title_paired_devices).setVisibility(View.VISIBLE);
                for (BluetoothDevice device : pairedDevices) {
                    mPairedDevicesArrayAdapter.add(device.getName() + &quot;\n&quot; + device.getAddress());
                }
            } else {
                String noDevices = getResources().getText(R.string.none_paired).toString();
                mPairedDevicesArrayAdapter.add(noDevices);
            }
        }
    
        @Override
        protected void onDestroy() {
            super.onDestroy();
    
            // Make sure we&#39;re not doing discovery anymore
            if (mBtAdapter != null) {
                mBtAdapter.cancelDiscovery();
            }
    
            // Unregister broadcast listeners
            this.unregisterReceiver(mReceiver);
        }
    
        /**
         * Start device discover with the BluetoothAdapter
         */
        private void doDiscovery() {
            if (D) Log.d(TAG, &quot;doDiscovery()&quot;);
    
            // Indicate scanning in the title
            setProgressBarIndeterminateVisibility(true);
            setTitle(R.string.scanning);
    
            // Turn on sub-title for new devices
            findViewById(R.id.title_new_devices).setVisibility(View.VISIBLE);
    
            // If we&#39;re already discovering, stop it
            if (mBtAdapter.isDiscovering()) {
                mBtAdapter.cancelDiscovery();
            }
    
            // Request discover from BluetoothAdapter
            mBtAdapter.startDiscovery();
        }
    
        // The on-click listener for all devices in the ListViews
        private OnItemClickListener mDeviceClickListener = new OnItemClickListener() {
            public void onItemClick(AdapterView&lt;?&gt; av, View v, int arg2, long arg3) {
                // Cancel discovery because it&#39;s costly and we&#39;re about to connect
                mBtAdapter.cancelDiscovery();
    
                // Get the device MAC address, which is the last 17 chars in the View
                String info = ((TextView) v).getText().toString();
                String address = info.substring(info.length() - 17);
    
                // Create the result Intent and include the MAC address
                Intent intent = new Intent();
                intent.putExtra(EXTRA_DEVICE_ADDRESS, address);
    
                // Set result and finish this Activity
                setResult(Activity.RESULT_OK, intent);
                finish();
            }
        };
    
        // The BroadcastReceiver that listens for discovered devices and
        // changes the title when discovery is finished
        private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                String action = intent.getAction();
    
                // When discovery finds a device
                if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                    // Get the BluetoothDevice object from the Intent
                    BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                    // If it&#39;s already paired, skip it, because it&#39;s been listed already
                    if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
                        mNewDevicesArrayAdapter.add(device.getName() + &quot;\n&quot; + device.getAddress());
                    }
                // When discovery is finished, change the Activity title
                } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
                    setProgressBarIndeterminateVisibility(false);
                    setTitle(R.string.select_device);
                    if (mNewDevicesArrayAdapter.getCount() == 0) {
                        String noDevices = getResources().getText(R.string.none_found).toString();
                        mNewDevicesArrayAdapter.add(noDevices);
                    }
                }
            }
        };
    }

   

             

Android + Pair devices via bluetooth programmatically

When opening an APK file with WinRar (software to open compressed files). I got a bunch of files packed inside the APK. Among them `classes.dex` is one. My question is what is the role of this file and if we modify/delete the same file will it affect the APK?

Role of classes.dex file in an apk file

I&#39;m trying to change the image of the ImageButton programmatically.

I&#39;m trying to copy this code, but the setBackgroundDrawable is already deprecated.



    public void giveClue(View view) {
        Drawable replacer = getResources().getDrawable(R.drawable.icon2);
    	((ImageButton) view).setEnabled(false);
    	((ImageButton) view).setBackgroundDrawable(replacer);
    	gameAdapter.giveClue(game);
    }

My button was created using xml as follows:

       &lt;ImageButton
            android:id=&quot;@+id/ImageButton2&quot;
            android:layout_width=&quot;24dp&quot;
            android:layout_height=&quot;22dp&quot;
            android:layout_alignTop=&quot;@+id/imageButton1&quot;
            android:layout_toLeftOf=&quot;@+id/ImageButton3&quot;
            android:src=&quot;@drawable/icon&quot; 
            android:onClick=&quot;giveClue&quot;/&gt;



  [1]: http://stackoverflow.com/questions/6751875/android-imagebutton-change-programmatically



Imagebutton change programmatically?

I want to set title and subtitile of my action bar before compile time.
I got a way to do it like this:

    ActionBar ab = getActionBar();
    ab.setTitle(&quot;My Title&quot;);
    ab.setSubtitle(&quot;sub-title&quot;);

But I don&#39;t want to do it on run time. Is there any xml file or any location where I can specify these titles?

I am trying to achieve this:

![enter image description here][1]

Edit:
--
The reason why I want it in xml is that I want my app to be supported in API level 8. And the method getActionBar() is supported at least on level 11.

  [1]: http://i.stack.imgur.com/Qrtbr.png

Setting Action Bar title and subtitle

I&#39;m trying to do some things on the ActionBar in Android.

I&#39;ve already added new items in the right side of the action bar.

How can I change the left side of the action bar? I want to change the icon and the text, and I want to add a &quot;Back Button&quot; in the action bar for the other screens

![Android Action Bar][1]


  [1]: http://i.stack.imgur.com/9w4cI.png

How do I change the android actionbar title and icon

I got a WebView that load an HTML file with a text. The problem is that the color inside the html and outside isn&#39;t the same. Here is a screenshot:

![The Activity With the WebView][1]


  [1]: http://i.stack.imgur.com/fVOcdl.png

The HTML FIle is:

    &lt;html dir=&quot;rtl&quot;&gt;
    &lt;head&gt;
        &lt;title&gt;About&lt;/title&gt;
        &lt;meta content=&quot;text/html; charset=UTF-8&quot; http-equiv=&quot;content-type&quot;/&gt;

        &lt;body bgcolor=&quot;#FFFFFF&quot;&gt;
            &lt;p&gt;This is a Testpp&lt;/p&gt;
            &lt;p&gt;See the problem.&lt;/p&gt;
             &lt;p&gt;last test:&lt;/p&gt;
        &lt;/body&gt;
    &lt;/html&gt;
(If I remove the: `bgcolor=&quot;#FFFFFF&quot;` color stays the same)
Thanks!


What is the default layout background

I&#39;ve been trying to find some way of removing the icon/logo from the action bar but the only thing I&#39;ve found after an hour of searching SO, Android&#39;s documentation and Google is how to remove the title bar in whole. That is not what I want. Only want to remove the icon/logo from the title bar.

Any one know how to accomplish this? Preferably I&#39;d like to do this in **XML**.


Remove icon/logo from action bar on android

Here is my layout:

![enter image description here][1]

The issue I&#39;m facing is with the drawable checkmark. How would I go about aligning it next to the text, both of them centered within the button? Here is the XML:

    &lt;RelativeLayout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:tools=&quot;http://schemas.android.com/tools&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;
        tools:context=&quot;.PostAssignmentActivity&quot; &gt;

        &lt;LinearLayout
            style=&quot;?android:attr/buttonBarStyle&quot;
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_alignParentBottom=&quot;true&quot;
            android:orientation=&quot;horizontal&quot; &gt;

            &lt;Button
                style=&quot;?android:attr/buttonBarButtonStyle&quot;
                android:layout_width=&quot;wrap_content&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:layout_weight=&quot;1&quot;
                android:drawableLeft=&quot;@drawable/ic_checkmark_holo_light&quot;
                android:text=&quot;Post&quot; /&gt;

            &lt;Button
                style=&quot;?android:attr/buttonBarButtonStyle&quot;
                android:layout_width=&quot;wrap_content&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:layout_weight=&quot;1&quot;
                android:text=&quot;Cancel&quot; /&gt;
        &lt;/LinearLayout&gt;

    &lt;/RelativeLayout&gt;

Applying android:gravity=&quot;center_vertical&quot; pulls the text and drawable together, but then the text is no longer aligned in the center.


  [1]: http://i.stack.imgur.com/207gZ.png

Aligning drawableLeft with text of button

I am having an error in following xml file. *&quot;Unexpected namespace prefix &quot;xmlns&quot; found for tag LinearLayout&quot;*. I tried the solutions provided in other similar questions also but it didn&#39;t work for me. Same error is occurring in 3 lines where `LinearLayout` is used.

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;ScrollView xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        android:layout_width=&quot;fill_parent&quot;
        android:layout_height=&quot;wrap_content&quot;
        android:background=&quot;@drawable/background&quot; &gt;

        &lt;LinearLayout
            xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
            android:layout_width=&quot;fill_parent&quot;
            android:layout_height=&quot;fill_parent&quot;
            android:orientation=&quot;vertical&quot; &gt;

            &lt;TextView
                android:id=&quot;@+id/menu_top_text&quot;
                android:layout_width=&quot;wrap_content&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:text=&quot;@string/name_version&quot;
                android:textColor=&quot;@color/black&quot;
                android:textSize=&quot;20sp&quot; /&gt;

            &lt;LinearLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:orientation=&quot;horizontal&quot; &gt;
            &lt;/LinearLayout&gt;

            &lt;!-- A horizontal line --&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;30px&quot; &gt;
            &lt;/FrameLayout&gt;

            &lt;LinearLayout
                xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:gravity=&quot;center_horizontal&quot;
                android:orientation=&quot;vertical&quot; &gt;

                &lt;LinearLayout
                    xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
                    android:layout_width=&quot;fill_parent&quot;
                    android:layout_height=&quot;wrap_content&quot;
                    android:gravity=&quot;center&quot;
                    android:orientation=&quot;horizontal&quot; &gt;

                    &lt;Button
                        android:id=&quot;@+id/start_stop_button&quot;
                        android:layout_width=&quot;74dp&quot;
                        android:layout_height=&quot;74dp&quot;
                        android:text=&quot;@string/start_server&quot; /&gt;

                    &lt;Button
                        android:id=&quot;@+id/instructions&quot;
                        android:layout_width=&quot;120dp&quot;
                        android:layout_height=&quot;74dp&quot;
                        android:text=&quot;@string/instructions_label&quot; /&gt;

                    &lt;Button
                        android:id=&quot;@+id/setup&quot;
                        android:layout_width=&quot;74dp&quot;
                        android:layout_height=&quot;74dp&quot;
                        android:text=&quot;@string/setup_label&quot; /&gt;
                &lt;/LinearLayout&gt;
            &lt;/LinearLayout&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;30px&quot; &gt;
            &lt;/FrameLayout&gt;

            &lt;!-- A horizontal line --&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;1px&quot;
                android:background=&quot;#666666&quot; &gt;
            &lt;/FrameLayout&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;10px&quot; &gt;
            &lt;/FrameLayout&gt;

            &lt;TableLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:shrinkColumns=&quot;2&quot; &gt;

                &lt;TableRow&gt;

                    &lt;TextView
                        android:layout_width=&quot;wrap_content&quot;
                        android:layout_height=&quot;wrap_content&quot;
                        android:gravity=&quot;left&quot;
                        android:text=&quot;@string/server_status&quot;
                        android:textColor=&quot;@color/black&quot;
                        android:textSize=&quot;16sp&quot; /&gt;
                    &lt;!-- A small spacer between the columns --&gt;

                    &lt;FrameLayout
                        android:layout_width=&quot;3sp&quot;
                        android:layout_height=&quot;wrap_content&quot; /&gt;

                    &lt;TextView
                        android:id=&quot;@+id/server_status&quot;
                        android:layout_width=&quot;wrap_content&quot;
                        android:layout_height=&quot;wrap_content&quot;
                        android:text=&quot;@string/unknown&quot;
                        android:textColor=&quot;@color/black&quot;
                        android:textSize=&quot;16sp&quot; /&gt;
                &lt;/TableRow&gt;
            &lt;/TableLayout&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;10px&quot; &gt;
            &lt;/FrameLayout&gt;

            &lt;!-- A horizontal line --&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;1px&quot;
                android:background=&quot;#666666&quot; &gt;
            &lt;/FrameLayout&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;10px&quot; &gt;
            &lt;/FrameLayout&gt;

            &lt;TableLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:shrinkColumns=&quot;2&quot; &gt;

                &lt;TableRow&gt;

                    &lt;TextView
                        android:layout_width=&quot;wrap_content&quot;
                        android:layout_height=&quot;wrap_content&quot;
                        android:gravity=&quot;left&quot;
                        android:text=&quot;@string/my_url_is&quot;
                        android:textColor=&quot;@color/black&quot;
                        android:textSize=&quot;16sp&quot; /&gt;
                    &lt;!-- A small spacer between the columns --&gt;

                    &lt;FrameLayout
                        android:layout_width=&quot;3sp&quot;
                        android:layout_height=&quot;wrap_content&quot; /&gt;

                    &lt;TextView
                        android:id=&quot;@+id/ip_address&quot;
                        android:layout_width=&quot;wrap_content&quot;
                        android:layout_height=&quot;wrap_content&quot;
                        android:text=&quot;@string/no_url_yet&quot;
                        android:textColor=&quot;@color/black&quot;
                        android:textSize=&quot;16sp&quot; /&gt;
                &lt;/TableRow&gt;

                &lt;TableRow&gt;

                    &lt;TextView
                        android:layout_width=&quot;wrap_content&quot;
                        android:layout_height=&quot;wrap_content&quot;
                        android:gravity=&quot;left&quot;
                        android:text=&quot;@string/wifi_status&quot;
                        android:textColor=&quot;@color/black&quot;
                        android:textSize=&quot;16sp&quot; /&gt;
                    &lt;!-- A small spacer between the columns --&gt;

                    &lt;FrameLayout
                        android:layout_width=&quot;3sp&quot;
                        android:layout_height=&quot;wrap_content&quot; /&gt;

                    &lt;TextView
                        android:id=&quot;@+id/wifi_status&quot;
                        android:layout_width=&quot;wrap_content&quot;
                        android:layout_height=&quot;wrap_content&quot;
                        android:text=&quot;@string/unknown&quot;
                        android:textColor=&quot;@color/black&quot;
                        android:textSize=&quot;16sp&quot; /&gt;
                &lt;/TableRow&gt;

                &lt;TableRow&gt;

                    &lt;TextView
                        android:id=&quot;@+id/last_error_label&quot;
                        android:layout_width=&quot;wrap_content&quot;
                        android:layout_height=&quot;wrap_content&quot;
                        android:gravity=&quot;left&quot;
                        android:text=&quot;@string/last_error&quot;
                        android:textSize=&quot;16sp&quot;
                        android:visibility=&quot;gone&quot; /&gt;
                    &lt;!-- A small spacer between the columns --&gt;

                    &lt;FrameLayout
                        android:layout_width=&quot;3sp&quot;
                        android:layout_height=&quot;wrap_content&quot; /&gt;

                    &lt;TextView
                        android:id=&quot;@+id/last_error&quot;
                        android:layout_width=&quot;wrap_content&quot;
                        android:layout_height=&quot;wrap_content&quot;
                        android:text=&quot;@string/unknown&quot;
                        android:textColor=&quot;#ff0000&quot;
                        android:textSize=&quot;16sp&quot;
                        android:visibility=&quot;gone&quot; /&gt;
                &lt;/TableRow&gt;
            &lt;/TableLayout&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;10px&quot; &gt;
            &lt;/FrameLayout&gt;

            &lt;!-- A horizontal line --&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;1px&quot;
                android:background=&quot;#666666&quot; &gt;
            &lt;/FrameLayout&gt;

            &lt;!--
              &lt;TextView android:id=&quot;@+id/proxy_header&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:text=&quot;@string/proxy_experimental&quot;
            android:textSize=&quot;16sp&quot;
            /&gt;
            --&gt;

            &lt;TableLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:shrinkColumns=&quot;2&quot; &gt;

                &lt;TableRow&gt;

                    &lt;!--
                     &lt;TextView
                    android:layout_height=&quot;wrap_content&quot;
                    android:layout_width=&quot;wrap_content&quot;
                    android:text=&quot;@string/proxy_status&quot;
                    android:textSize=&quot;16sp&quot;
                    android:gravity=&quot;left&quot;
                    /&gt;
                    --&gt;
                    &lt;!-- A small spacer between the columns --&gt;

                    &lt;FrameLayout
                        android:layout_width=&quot;3sp&quot;
                        android:layout_height=&quot;wrap_content&quot; /&gt;
                &lt;/TableRow&gt;

                &lt;TableRow&gt;

                    &lt;!-- A small spacer between the columns --&gt;

                    &lt;FrameLayout
                        android:layout_width=&quot;3sp&quot;
                        android:layout_height=&quot;wrap_content&quot; /&gt;
                &lt;/TableRow&gt;

                &lt;TableRow&gt;

                    &lt;!-- A small spacer between the columns --&gt;

                    &lt;FrameLayout
                        android:layout_width=&quot;3sp&quot;
                        android:layout_height=&quot;wrap_content&quot; /&gt;
                &lt;/TableRow&gt;

                &lt;TableRow&gt;

                    &lt;!-- A small spacer between the columns --&gt;

                    &lt;FrameLayout
                        android:layout_width=&quot;3sp&quot;
                        android:layout_height=&quot;wrap_content&quot; /&gt;
                &lt;/TableRow&gt;
            &lt;/TableLayout&gt;

            &lt;!-- A horizontal line --&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;1dp&quot;
                android:background=&quot;#666666&quot; &gt;
            &lt;/FrameLayout&gt;

            &lt;!-- A horizontal line --&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;1dp&quot;
                android:background=&quot;#666666&quot; &gt;
            &lt;/FrameLayout&gt;

            &lt;LinearLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:orientation=&quot;horizontal&quot;
                android:visibility=&quot;gone&quot; &gt;

                &lt;TextView
                    android:layout_width=&quot;wrap_content&quot;
                    android:layout_height=&quot;wrap_content&quot;
                    android:text=&quot;@string/server_log&quot;
                    android:textColor=&quot;#ffffff&quot; /&gt;

                &lt;CheckBox
                    android:id=&quot;@+id/server_log_checkbox&quot;
                    android:layout_width=&quot;wrap_content&quot;
                    android:layout_height=&quot;wrap_content&quot;
                    android:checked=&quot;false&quot; /&gt;
            &lt;/LinearLayout&gt;

            &lt;TextView
                android:id=&quot;@+id/server_log&quot;
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:background=&quot;#333333&quot; /&gt;

            &lt;!-- A horizontal line --&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;1dp&quot;
                android:background=&quot;#666666&quot;
                android:visibility=&quot;gone&quot; &gt;
            &lt;/FrameLayout&gt;

            &lt;LinearLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:orientation=&quot;horizontal&quot;
                android:visibility=&quot;gone&quot; &gt;

                &lt;TextView
                    android:layout_width=&quot;wrap_content&quot;
                    android:layout_height=&quot;wrap_content&quot;
                    android:text=&quot;@string/session_monitor&quot;
                    android:textColor=&quot;#ffffff&quot;
                    android:visibility=&quot;gone&quot; /&gt;

                &lt;CheckBox
                    android:id=&quot;@+id/session_monitor_checkbox&quot;
                    android:layout_width=&quot;wrap_content&quot;
                    android:layout_height=&quot;wrap_content&quot;
                    android:checked=&quot;false&quot;
                    android:visibility=&quot;gone&quot; /&gt;
            &lt;/LinearLayout&gt;

            &lt;TextView
                android:id=&quot;@+id/session_monitor&quot;
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:background=&quot;#333333&quot;
                android:visibility=&quot;gone&quot; /&gt;

            &lt;!-- A horizontal line --&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;1dp&quot;
                android:background=&quot;#666666&quot; &gt;
            &lt;/FrameLayout&gt;

            &lt;!-- It&#39;s visually pleasing to have some empty space at the bottom --&gt;

            &lt;FrameLayout
                android:layout_width=&quot;fill_parent&quot;
                android:layout_height=&quot;15dp&quot; /&gt;
        &lt;/LinearLayout&gt;

    &lt;/ScrollView&gt;

Unexpected namespace prefix &quot;xmlns&quot; found for tag LinearLayout

**Edited Question:**

**Mobile Resolution:**&lt;br&gt; I would like to design different screen dpi like following resolutions. 
&lt;br&gt;320x480,&lt;br&gt;480&#215;800,&lt;br&gt;540x960,&lt;br&gt;720x1280 (Samsung S3),&lt;br&gt;1080x1920 (S4, Nexus5,Nexus 5x, Moto G4),&lt;br&gt;2560 x 1440 (Nexus 6, Nexus 6p, Samsung edge)&lt;br&gt;&lt;br&gt;
**Tablet Resolution:**&lt;br&gt; 480x800 (micromax) ,&lt;br&gt;600x1024 (samsung tab2),&lt;br&gt;800x1280 (nexus 7),&lt;br&gt;1200x1920 (new nexus 7),&lt;br&gt;2048x1536 (nexus 9)
 
I want to use **different font sizes** depending on the device display resolution. 

Q1) What is the `best` way to solve this `problem`?

Q2) What is best option doing throw coding or XML?

Q3) Which drawable folder is represent which device resolution?

Q4) Application Launcher icon size for different resolution?


Different resolution support android

I am using [Plurals][1] to simplify my code.  e.g., I used to have 
     
    &lt;string name=&quot;cat&quot;&gt;Cat&lt;/string&gt;
    &lt;string name=&quot;cats&quot;&gt;Cats&lt;/string&gt;

Using Plurals instead of multiple strings, I now have

	&lt;plurals name=&quot;cats&quot;&gt;
        &lt;item quantity=&quot;one&quot;&gt;Cat&lt;/item&gt;
        &lt;item quantity=&quot;other&quot;&gt;Cats&lt;/item&gt;
    &lt;/plurals&gt;

However, I used to retrieve strings to use as titles or summaries in my XML.
e.g.,

    android:title=&quot;@string/cats&quot;

Having removed that string in favor of a Plural, I am now unsure how to retrieve my string from XML.  I did make a naive attempt with

    android:title=&quot;@plurals/cats&quot;
but this just gives me `@1234567890` instead of `Cats` (or `Cat`).

Anyone know if it is possible to retrieve a string out of a Plural from XML?

  [1]: http://developer.android.com/guide/topics/resources/string-resource.html#Plurals

Getting a String from Plurals to use in XML?

I have custom designed `EditText` 

![enter image description here][1]


**search_page.xml**

    &lt;LinearLayout
        android:layout_width=&quot;fill_parent&quot;
        android:layout_height=&quot;wrap_content&quot;
        android:orientation=&quot;horizontal&quot;
        android:padding=&quot;10dp&quot;
        android:background=&quot;#E1E1E1&quot;
        android:weightSum=&quot;1&quot; &gt;
    
        &lt;TextView
            android:layout_width=&quot;0dp&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_weight=&quot;.25&quot;
            android:text=&quot;City&quot; /&gt;
    
        &lt;EditText
            android:layout_width=&quot;0dp&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_marginLeft=&quot;10dp&quot;
            android:background=&quot;@drawable/rounded_edittext&quot;
            android:layout_weight=&quot;.75&quot; /&gt;
    &lt;/LinearLayout&gt;



**rounded_edittext.xml**

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;!-- res/drawable/rounded_edittext.xml --&gt;
    &lt;shape xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        android:padding=&quot;10dp&quot;
        android:shape=&quot;rectangle&quot; &gt;
    
        &lt;solid android:color=&quot;#FFFFFF&quot; /&gt;
    
        &lt;corners
            android:bottomLeftRadius=&quot;10dp&quot;
            android:bottomRightRadius=&quot;10dp&quot;
            android:topLeftRadius=&quot;10dp&quot;
            android:topRightRadius=&quot;10dp&quot; /&gt;
    
    &lt;/shape&gt;


----------

I want to use color code **`#2f6699`** to get a border color like an outline to the `EditText` text box as below:

![enter image description here][2]





**Any ideas on how to achieve this?** 


  [1]: http://i.stack.imgur.com/1Vrll.png
  [2]: http://i.stack.imgur.com/ll2Gf.png

Custom designing EditText

even with android support v7 included in my application

adding
`android:background=&quot;?android:attr/selectableItemBackground&quot;`

makes my IDE, Eclipse throw an error (preventing me from compiling), notifying me that selectableItemBackground is only for min Api 11 and up.

How do I add this attribute to a background in XML?

assume that copying and pasting from a higher library is not a solution

Content Type	Original Author	Original Content on Stackoverflow
Question	VATSHAL	View Question on Stackoverflow
Solution 1 - Android	android developer	View Answer on Stackoverflow

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