The only reliable way I&#39;ve found so far is reloading the project / restarting Android Studio.

Quickest way to do that is **File &amp;rarr; Invalidate caches / Restart... &amp;rarr; Just Restart**.

Feel free to post better solutions!

you DO NOT need to close the entire project. It&#39;s just way too much for so little problem.

Just refresh the preview (click the &quot;refresh&quot; button)
[![refresh button arrow][1]][1]

provided from https://stackoverflow.com/a/34754707/3339597

  [1]: http://i.stack.imgur.com/2JbBN.png

Right click on project and Synchronize &#39;...Project&#39; worked for me.

There are three steps for solving this problem 

 1. **Build --&gt;Clean Project**
 
 2. **Build --&gt;Rebuild Project**
 
 3. Restart android studio

Couldn&#39;t resolve resource @string/faq_customer_service
or
Couldn&#39;t resolve resource @id/visible 
or
Couldn&#39;t resolve resource @id/masked 
The solution is if you implement TextInputLayout the above problems may arise ... so Simply add those id or strings to xml files as their property.

**File → Invalidate caches / Restart... → Just Restart** ... didn&#39;t work for me


**File → Invalidate caches / Restart... → Invalidate And Restart** ... worked for me

**Render Problem**:

    Couldn&#39;t resolve resource @string/hello_blank_fragment

Just refresh the Layout. 

work for me..

I am getting the following errors when trying to run a piece of python code:

    import: unable to open X server `&#39; @ error/import.c/ImportImageCommand/366.
    from: can&#39;t read /var/mail/datetime
    ./mixcloud.py: line 3: syntax error near unexpected token `(&#39;
    ./mixcloud.py: line 3: `now = datetime.now()&#39;


The code:

    import requests
    from datetime import datetime,date,timedelta

    now = datetime.now()

I really lack to see a problem. Is this something that my server is just having a problem with and not the code itself?



Python error &quot;import: unable to open X server&quot;

i have this radio button (and some other after this one):

    &lt;input type=&quot;radio&quot; name=&quot;group1&quot; value=&quot;Milk&quot;&gt; Milk&lt;br&gt;

But if i want to activate the radio button, i have to click it, clicking the word &quot;Milk&quot; which is to the right of the button, doesn&#39;t activate it. How can i do that?, all the examples i found about radio buttons so far, have the same issue. Thanks in advance.


How do you make the radio button text to be clickable too?

After adding new items in `strings.xml`, quite often they don&#39;t start working immediately in Android Studio&#39;s Preview. 

&gt; Couldn&#39;t resolve resource @string/faq_customer_service

Preview looks like this: 

![enter image description here][1]

I&#39;ve obviously tried to re-build the project, and even run `gradle clean assembleDebug`, but it doesn&#39;t seem to help. On emulator &amp; real device the newly-added string resources do work.

Any trick to force Android Studio to reload the resources so that the correct texts show up in Preview? 


  [1]: http://i.stack.imgur.com/f0tlF.png

&quot;Couldn&#39;t resolve resource&quot; in Android Studio&#39;s Preview

After adding new items in <code>strings.xml</code>, quite often they don't start working immediately in Android Studio's Preview.
> Couldn't resolve resource @string/faq_customer_service
Preview looks like this:
<img src="http://i.stack.imgur.com/f0tlF.png" alt="enter image description here">
I've obviously tried to re-build the project, and even run <code>gradle clean assembleDebug</code>, but it doesn't seem to help. On emulator &#x26; real device the newly-added string resources do work.
Any trick to force Android Studio to reload the resources so that the correct texts show up in Preview?

Is it possible to use a navigation drawer in android but instead of updating fragments, i would like to switch between activities as my means of navigation within the app.

Navigation Drawer to switch activities instead of fragments

I made a working navigation drawer like it&#39;s shown in the tutorial on the [developer.android.com][1] website. But now, I want to use one Navigation Drawer, i created in the NavigationDrawer.class for multiple Activities in my Application.

My question is, if anyone here can make a little Tutorial, which explains, how to use one Navigation drawer for multiple Activities.

I read it first at this Answer
https://stackoverflow.com/q/18697966/2876645

but it didn&#39;t work on my Project

    public class NavigationDrawer extends Activity {
	public DrawerLayout drawerLayout;
	public ListView drawerList;
	private ActionBarDrawerToggle drawerToggle;

	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
		drawerToggle = new ActionBarDrawerToggle((Activity) this, drawerLayout, R.drawable.ic_drawer, 0, 0) {

			public void onDrawerClosed(View view) {
				getActionBar().setTitle(R.string.app_name);
			}

			public void onDrawerOpened(View drawerView) {
				getActionBar().setTitle(R.string.menu);
			}
		};
		drawerLayout.setDrawerListener(drawerToggle);

		getActionBar().setDisplayHomeAsUpEnabled(true);
		getActionBar().setHomeButtonEnabled(true);

		listItems = getResources().getStringArray(R.array.layers_array);
		drawerList = (ListView) findViewById(R.id.left_drawer);
		drawerList.setAdapter(new ArrayAdapter&lt;String&gt;(this, R.layout.drawer_list_item, android.R.id.text,
				listItems));
		
		drawerList.setOnItemClickListener(new OnItemClickListener() {
			@Override
			public void onItemClick(AdapterView&lt;?&gt; arg0, View arg1, int pos, long arg3) {
			    drawerClickEvent(pos);
			}
		});
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {

		if (drawerToggle.onOptionsItemSelected(item)) {
			return true;
		}
		return super.onOptionsItemSelected(item);

	}

	@Override
	protected void onPostCreate(Bundle savedInstanceState) {
		super.onPostCreate(savedInstanceState);
		drawerToggle.syncState();
	}

	@Override
	public void onConfigurationChanged(Configuration newConfig) {
		super.onConfigurationChanged(newConfig);
		drawerToggle.onConfigurationChanged(newConfig);
	}
    }

In this Activity i want to have the Navigation Drawer so I extends &#39;NavigationDrawer&#39; and in some other Activities i want to User the Same Navigation drawer 
  

      public class SampleActivity extends NavigationDrawer {...}



  [1]: http://developer.android.com

Same Navigation Drawer in different Activities

I&#39;m currently learning some android for a school project and I can&#39;t figure out the way to **set text dynamically** to a `TextView`. 

Here is my code:

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_enviar_mensaje);
        err = (TextView)findViewById(R.id.texto);
        err.setText(&quot;Escriba su mensaje y luego seleccione el canal.&quot;);
    }


This is currently not working and I can&#39;t find a way to make it work...


Any help will be much appreciated...
Thank you for the time,
Jos&#233;.



EDIT: Here is the **activity_enviar_mensaje.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;wrap_content&quot;
        ...
        tools:context=&quot;.EnviarMensaje&quot; &gt;
        ...
        &lt;TextView
            android:id=&quot;@+id/texto&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_alignLeft=&quot;@+id/listaVista&quot;
            android:layout_alignParentBottom=&quot;true&quot;
            android:layout_alignRight=&quot;@+id/listaVista&quot;
            android:text=&quot;TextView&quot; /&gt;
        ...
    &lt;/RelativeLayout&gt;


By not working I mean the text shown does not change at any moment...

Android - Set text to TextView

I used Eclipse before and I could easily stop logcat from scrolling, but I can&#39;t find same funcionality in Android studio. Anyone knows how to do it?

How to stop logcat from scrolling in Android Studio

I&#39;ve got an old eclipse project I&#39;ve moved into android studio and setup to use flavors.  It seemed to be working fine till I started trying to use different java files between my flavors.

My project setup is this:

    ProjectRoot
    +- acitonbarsherlock
    +- facebook
    +- myLib1
    +- myProject
       +- src
          +- commonFiles
             +- flavor1
             +- flavor2
       +- res
          +- flavor1
          +- flavor2

The innards of the myProject gradle file android closure looks like this:

    android {
    compileSdkVersion 17
    buildToolsVersion &quot;18.0.1&quot;

    signingConfigs {
         ...
    }

    productFlavors {
        flavor2 {
        }
        flavor1 {
        }
    }

    sourceSets{
        main {
            manifest.srcFile &#39;AndroidManifest.xml&#39;
            java.srcDirs = [&#39;src/commonFiles/java&#39;]
            resources.srcDirs = [&#39;src/commonFiles/java&#39;]
            aidl.srcDirs = [&#39;src/commonFiles/java&#39;]
            renderscript.srcDirs = [&#39;src/commonFiles/java&#39;]
            res.srcDirs = [&#39;res&#39;]
            assets.srcDirs = [&#39;assets&#39;]
        }

        flavor2 {
            manifest.srcFile &#39;AndroidManifest-flavor2.xml&#39;
            res.srcDirs = [&#39;res-flavor2&#39;, &#39;res&#39;]
            java.srcDirs = [&#39;src/flavor2/java&#39;,&#39;src/commonFiles/java&#39;]
            resources.srcDirs = [&#39;src/flavor2/java&#39;,&#39;src/commonFiles/java&#39;]
            aidl.srcDirs = [&#39;src/flavor2/java&#39;,&#39;src/commonFiles/java&#39;]
            renderscript.srcDirs = [&#39;src/flavor2/java&#39;,&#39;src/commonFiles/java&#39;]
        }

        flavor1 {
            manifest.srcFile &#39;AndroidManifest.xml&#39;
            java.srcDirs = [&#39;src/flavor1/java&#39;,&#39;src/commonFiles/java&#39;]
            resources.srcDirs = [&#39;src/flavor1/java&#39;,&#39;src/commonFiles/java&#39;]
            aidl.srcDirs = [&#39;src/flavor1/java&#39;,&#39;src/commonFiles/java&#39;]
            renderscript.srcDirs = [&#39;src/flavor1/java&#39;,&#39;src/commonFiles/java&#39;]
            res.srcDirs = [&#39;res-flavor1&#39;,&#39;res&#39;]
            assets.srcDirs = [&#39;assets&#39;]
        }

        // Move the tests to tests/java, tests/res, etc...
        instrumentTest.setRoot(&#39;tests&#39;)

        // Move the build types to build-types/&lt;type&gt;
        // For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
        // This moves them out of them default location under src/&lt;type&gt;/... which would
        // conflict with src/ being used by the main source set.
        // Adding new build types or product flavors should be accompanied
        // by a similar customization.
        debug.setRoot(&#39;build-types/debug&#39;)
        release.setRoot(&#39;build-types/release&#39;)

    }

	buildTypes {
		release {
			signingConfig signingConfigs.release
		}
	}
}


With my setup like this gradle complains about not being able to find classes I&#39;m trying to inherit from commonFiles in flavor1 or flavor2.

From the various other topics I&#39;ve looked at on here I see others not even defining source sets, and I feel like what I&#39;m doing in them is perhaps too much.

Has anyone experimented with this before and know how this should properly be configured?

Gradle flavors for android with custom source sets - what should the gradle files look like?

I want to change the minimum SDK version in Android Studio from API 12 to API 14. I have tried changing it in the manifest file, i.e.,

    &lt;uses-sdk
        android:minSdkVersion=&quot;14&quot;
        android:targetSdkVersion=&quot;18&quot; /&gt;

and rebuilding the project, but I still get the Android Studio IDE throwing up some errors. I presume I have to set the min SDK in &#39;project properties&#39; or something similar so the IDE recognizes the change, but I can&#39;t find where this is done in Android Studio.

Changing API level Android Studio

When I try to debug through my code in Android (using Step Into, F7 command), the debugger takes me through all system classes, which I do not want.

For example, when I place a breakpoint at the 2nd line below (i.e. &quot;startActivity(ourIntent);&quot;), instead of going into my Activity (i.e. &quot;myclass), the execution point goes into Activity.java &gt; Instrumentation.java, etc... all system classes.

I dont want that. I only want to step through my code that I have written.

What is a way to achieve this?

            Intent ourIntent = new Intent(MainActivity.this, &quot;com.practice.gamesbook.myclass&quot;);
            startActivity(ourIntent);


&quot;Add new Pattern&quot; option under &quot;Debugger&quot; &gt; &quot;Stepping&quot; is disabled

![enter image description here][1]


  [1]: http://i.stack.imgur.com/so1Vv.jpg

(Android Studio) How to debug through my code only?

I&#39;m importing twitter4j in AndroidStudio, using the following in my build.gradle:

    dependencies {
      compile &#39;com.android.support:support-v4:18.0.+&#39;
      compile files(&#39;libs/twitter4j-core-3.0.4.jar&#39;)
    }

The project compiles fine, and I can create twitter objects without a problem. However, in Android studio, anything referencing that library shows &quot;cannot resolve symbol&quot; and displays in red. What do I need to do to get Android Studio to recognize the library?

I have already tried rebuilding the project, ./gradlew clean, and closing and re-opening my project.

Content Type	Original Author	Original Content on Stackoverflow
Question	Jonik	View Question on Stackoverflow
Solution 1 - Android	Jonik	View Answer on Stackoverflow
Solution 2 - Android	Re'em	View Answer on Stackoverflow
Solution 3 - Android	Şah-ı Merdan	View Answer on Stackoverflow
Solution 4 - Android	Harun ERGUL	View Answer on Stackoverflow
Solution 5 - Android	keshav mainali	View Answer on Stackoverflow
Solution 6 - Android	Zain	View Answer on Stackoverflow
Solution 7 - Android	HeshanHH	View Answer on Stackoverflow

"Couldn't resolve resource" in Android Studio's Preview

Android Problem Overview

Android Solutions

Solution 1 - Android

Solution 2 - Android

Solution 3 - Android

Solution 4 - Android

Solution 5 - Android

Solution 6 - Android

Solution 7 - Android

How do you make the radio button text to be clickable too?

Python error "import: unable to open X server"

Attributions