Android Intent.createChooser()

Intent.createChooser(ntent target, CharSequence title)

  其实 大家对该功能第一影响就是ApiDemo 里面的 其只有区区几行代码 提取为:

  Java代码

  Intent intent = new Intent(Intent.ACTION_GET_CONTENT);

  intent.setType("audio/*");

  startActivity(Intent.createChooser(intent, "Select music"));

  执行之 会弹出一个对话框 效果为:

Android Intent.createChooser() 妙用


  

 

 

 

 

 

其实 对于这段代码 大家应该都能猜出什么意思 现自己模拟并理解之

  [代码]

  1. 定义TestActivity 用于根据传入Uri 播放目标

  public class TestActivity extends Activity {   @Override   public void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.main);   this.setTitle("TestActivity");   Intent i = this.getIntent();   Uri u = i.getData();   try {   playMusic(u);   } catch (IllegalArgumentException e) {   // TODO Auto-generated catch block   e.printStackTrace();   } catch (SecurityException e) {   // TODO Auto-generated catch block   e.printStackTrace();   } catch (IllegalStateException e) {   // TODO Auto-generated catch block   e.printStackTrace();   } catch (IOException e) {   // TODO Auto-generated catch block   e.printStackTrace();   }   }   public void playMusic(Uri uri) throws IllegalArgumentException, SecurityException, IllegalStateException, IOException{   MediaPlayer mp = new MediaPlayer();   mp.setDataSource(this, uri);mp.prepare();   mp.start();   }   }

 

  2. 在AndroidManifest 注册TestActivity

  Java代码

  < activity android:name=".TestActivity"

  android:label="TestActivity">

  < intent-filter>

  < action android:name="android.intent.action.GET_CONTENT" />

  < category android:name="android.intent.category.DEFAULT" />

  < category android:name="android.intent.category.OPENABLE" />

  < data android:mimeType="audio/music1" />

  < /intent-filter>

  < /activity>

  3. 使用TestActivity

  Java代码

  public void sendChooser(){

  Intent intent = new Intent(Intent.ACTION_GET_CONTENT);

  intent.setDataAndType(Uri.parse("file:///sdcard/DCIM/cc.mp3"), "audio/music1");

  startActivity(Intent.createChooser(intent, "Select music1 app"));

  }

  4. emulator 运行截图:

Android Intent.createChooser() 妙用

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