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POReceiving text from other apps via Share menu
 

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  1. POReceiving text from other apps via Share menu
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    <p>I'm writing a language dictionary app for myself (as a kind of Android-programming learning exercise).</p> <p>I want my app to be listed as an option in the intent chooser of other apps, so I add these code lines to my manifest: </p> <pre><code> &lt;intent-filter&gt; &lt;action android:name="android.intent.action.SEND" /&gt; &lt;category android:name="android.intent.category.DEFAULT" /&gt; &lt;data android:mimeType="text/plain" /&gt; &lt;/intent-filter&gt; </code></pre> <p>My app successfully appears in the action menu of other apps (e.g. Browser), which is good. My app is also successfully called via Share when I choose it from Browser action menu.</p> <p>Now I want my app to receive and process text (a word) sent from other apps, and then automatically look the text up for its definition. I add the following code lines to the main activity of my app:</p> <pre><code>//(under onCreate) Intent intent = getIntent(); String action = intent.getAction(); String type = intent.getType(); EditText edittext = (EditText) findViewById(R.id.edWord); if (Intent.ACTION_SEND.equals(action) &amp;&amp; type != null) { if ("text/plain".equals(type)) { String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT); if (sharedText != null) { edittext.setText(sharedText); } } } </code></pre> <p>However at this stage, Browser gets crashed every time my app is chosen from the action menu via Share. </p> <p>So it comes to my questions:</p> <ol> <li><strong>What have I done wrong?</strong> </li> <li><strong>How/What could I do to "force" my app to accept text from other apps, and automatically display its definition?</strong></li> </ol> <p>Sorry for these are noobie questions (my headache, though). </p> <p>Thank you very much for your help.</p> <p><strong>UPDATE 1</strong></p> <p>Thanks, CommonWare. Nothing is produced when Browser is crashed but when I choose "Share" from the web view of my app, I get this log cat:</p> <pre><code>08-09 18:17:23.726: W/dalvikvm(1111): threadid=1: thread exiting with uncaught exception (group=0x409961f8) 08-09 18:17:23.776: E/AndroidRuntime(1111): FATAL EXCEPTION: main 08-09 18:17:23.776: E/AndroidRuntime(1111): java.lang.RuntimeException: Unable to start activity ComponentInfo{peter.kadict/peter.kadict.Kadict}: java.lang.NullPointerException 08-09 18:17:23.776: E/AndroidRuntime(1111): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955) 08-09 18:17:23.776: E/AndroidRuntime(1111): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980) 08-09 18:17:23.776: E/AndroidRuntime(1111): at android.app.ActivityThread.access$600(ActivityThread.java:122) 08-09 18:17:23.776: E/AndroidRuntime(1111): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146) 08-09 18:17:23.776: E/AndroidRuntime(1111): at android.os.Handler.dispatchMessage(Handler.java:99) 08-09 18:17:23.776: E/AndroidRuntime(1111): at android.os.Looper.loop(Looper.java:137) 08-09 18:17:23.776: E/AndroidRuntime(1111): at android.app.ActivityThread.main(ActivityThread.java:4340) 08-09 18:17:23.776: E/AndroidRuntime(1111): at java.lang.reflect.Method.invokeNative(Native Method) 08-09 18:17:23.776: E/AndroidRuntime(1111): at java.lang.reflect.Method.invoke(Method.java:511) 08-09 18:17:23.776: E/AndroidRuntime(1111): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 08-09 18:17:23.776: E/AndroidRuntime(1111): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 08-09 18:17:23.776: E/AndroidRuntime(1111): at dalvik.system.NativeStart.main(Native Method) 08-09 18:17:23.776: E/AndroidRuntime(1111): Caused by: java.lang.NullPointerException 08-09 18:17:23.776: E/AndroidRuntime(1111): at peter.kadict.Kadict.onCreate(Kadict.java:449) 08-09 18:17:23.776: E/AndroidRuntime(1111): at android.app.Activity.performCreate(Activity.java:4465) 08-09 18:17:23.776: E/AndroidRuntime(1111): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 08-09 18:17:23.776: E/AndroidRuntime(1111): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919) 08-09 18:17:23.776: E/AndroidRuntime(1111): ... 11 more </code></pre> <p><strong>UPDATE 2</strong></p> <p>This code has solved the problem thanks to <strong>CommonsWare</strong>. </p> <pre><code> Intent intent = getIntent(); String action = intent.getAction(); String type = intent.getType(); if (Intent.ACTION_SEND.equals(action) &amp;&amp; type != null) { if ("text/plain".equals(type)) { String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT); if (sharedText != null) { setContentView(R.layout.main); EditText edittext = (EditText) findViewById(R.id.edWord); edittext.setText(sharedText); } } } </code></pre> <p>But it does not do its task: the app is loaded but does not seem to receive and process the text (word) sent from other apps. </p> <p>Can you you guys help? Many thanks.</p>
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    1. COUse `adb logcat`, DDMS, or the DDMS perspective in Eclipse to examine LogCat and look at the stack trace associated with your crash.
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    2. CO@CommonsWare: Thanks a lot. Please have a look at my update.
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    3. COjava.lang.NullPointerException --> Kadict.java line 449. Should be straight enough, what's on that line?
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      1. USMichael Laffargue
 

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