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POMultiple videoview issue
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copied!<p>i have app contain 5 button each button open different videoview , when i create code , i have red mark under : (new MediaController(this)) , i try alot to solve it but i cant ,</p> <p>please any advice to get out of it , i'm Novice in android development ,</p> <p>thanks </p> <p>UPDATE after apply changed to : (new MediaController(this)) , get another error</p> <p><strong>my code :</strong></p> <p><strong>MultipleButton CLASS :</strong></p> <pre><code>public class MultipleButton extends Activity { String night; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } public void handleClick(View v){ //Create an intent to start the new activity. Intent intent = new Intent(); intent.setClass(this,My_videos.class); intent.putExtra("video",night); startActivity(intent); } } </code></pre> <p>My_videos CLASS :<strong>strong text</strong> </p> <pre><code> public class My_videos extends Activity { private Button button; private VideoView vid; String night; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.video); initializeVideoViews(); } private void initializeVideoViews() { String night = getIntent().getStringExtra("video"); if(night.equalsIgnoreCase("button1")){ button = (Button) findViewById(R.id.button1); button.setOnClickListener(new OnClickListener() { public void onClick(View arg0) { vid =(VideoView) findViewById(R.id.videoView1); vid.setVideoURI(Uri.parse("android.resource://" + getPackageName() +"/"+R.raw.a)); vid.setMediaController(new MediaController(My_videos.this)); vid.requestFocus(); vid.start(); } }); } else if(night.equalsIgnoreCase("button2")){ button = (Button) findViewById(R.id.button2); button.setOnClickListener(new OnClickListener() { public void onClick(View arg0) { vid = (VideoView) findViewById(R.id.videoView1); vid.setVideoURI(Uri.parse("android.resource://" + getPackageName() +"/"+R.raw.b)); vid.setMediaController(new MediaController(My_videos.this)); vid.requestFocus(); } });} else if(night.equalsIgnoreCase("button3")){ button = (Button) findViewById(R.id.button3); button.setOnClickListener(new OnClickListener() { public void onClick(View arg0) { vid = (VideoView) findViewById(R.id.videoView1); vid.setVideoURI(Uri.parse("android.resource://" + getPackageName() +"/"+R.raw.c)); vid.setMediaController(new MediaController(My_videos.this)); vid.requestFocus(); } });} else if(night.equalsIgnoreCase("button4")){ button = (Button) findViewById(R.id.button4); button.setOnClickListener(new OnClickListener() { public void onClick(View arg0) { vid = (VideoView) findViewById(R.id.videoView1); vid.setVideoURI(Uri.parse("android.resource://" + getPackageName() +"/"+R.raw.d)); vid.setMediaController(new MediaController(My_videos.this)); vid.requestFocus(); } });} else if(night.equalsIgnoreCase("button5")){ button = (Button) findViewById(R.id.button5); button.setOnClickListener(new OnClickListener() { public void onClick(View arg0) { vid = (VideoView) findViewById(R.id.videoView1); vid.setVideoURI(Uri.parse("android.resource://" + getPackageName() +"/"+R.raw.e)); vid.setMediaController(new MediaController(My_videos.this)); vid.requestFocus(); } }); }}} </code></pre> <p>UPDATE : <strong>strong text</strong> </p> <p><strong>LOGCAT:</strong></p> <pre><code>I/Process(25196): Sending signal. PID: 25196 SIG: 9 D/AndroidRuntime(25447): Shutting down VM W/dalvikvm(25447): threadid=1: thread exiting with uncaught exception (group=0x40015578) E/AndroidRuntime(25447): FATAL EXCEPTION: main E/AndroidRuntime(25447): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.tsn.dr/com.tsn.dr.My_videos}: java.lang.NullPointerException E/AndroidRuntime(25447):at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:1651) E/AndroidRuntime(25447):at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:1667) E/AndroidRuntime(25447):at android.app.ActivityThread.access$1500 (ActivityThread.java:117) E/AndroidRuntime(25447):at android.app.ActivityThread$H.handleMessage (ActivityThread.java:935) E/AndroidRuntime(25447):at android.os.Handler.dispatchMessage(Handler.java:99) E/AndroidRuntime(25447):at android.os.Looper.loop(Looper.java:123) E/AndroidRuntime(25447):at android.app.ActivityThread.main(ActivityThread.java:3687) E/AndroidRuntime(25447):at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime(25447):at java.lang.reflect.Method.invoke(Method.java:507) E/AndroidRuntime(25447):at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:842) E/AndroidRuntime(25447):at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:600) E/AndroidRuntime(25447):at dalvik.system.NativeStart.main(Native Method) E/AndroidRuntime(25447): Caused by: java.lang.NullPointerException E/AndroidRuntime(25447):at com.tsn.dr.My_videos.initializeVideoViews (My_videos.java:31) E/AndroidRuntime(25447):at com.tsn.dr.My_videos.onCreate(My_videos.java:24) E/AndroidRuntime(25447):at android.app.Instrumentation.callActivityOnCreate (Instrumentation.java:1047) E/AndroidRuntime(25447):at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:1615) E/AndroidRuntime(25447): ... 11 more </code></pre> <p>manifest.xml:</p> <pre><code><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.tsn.dr" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" /> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" > <activity android:name=".MultipleButton" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".My_videos" android:label="@string/app_name"> </activity> </application> </code></pre> <p></p> <p>main.xml:</p> <pre><code><?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:onClick="handleClick" android:text="Button" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:onClick="handleClick" android:text="Button" /> <Button android:id="@+id/button3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:onClick="handleClick" android:text="Button" /> <Button android:id="@+id/button4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:onClick="handleClick" android:text="Button" /> <Button android:id="@+id/button5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:onClick="handleClick" android:text="Button" /> </LinearLayout> </code></pre> <p>video.xml:</p> <pre><code><?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <VideoView android:id="@+id/videoView1" android:layout_width="match_parent" android:layout_height="wrap_content" /> </LinearLayout> </code></pre>

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