1
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:
1
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
2
intent.setType("audio/*");
3
startActivity(Intent.createChooser(intent, "Select music"));
执行之 会弹出一个对话框 效果为:
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
01
public class TestActivity extends Activity {
02
03
@Override
04
public void onCreate(Bundle savedInstanceState) {
05
super.onCreate(savedInstanceState);
06
setContentView(R.layout.main);
07
this.setTitle("TestActivity");
08
09
Intent i = this.getIntent();
10
11
Uri u = i.getData();
12
13
try {
14
playMusic(u);
15
} catch (IllegalArgumentException e) {
16
// TODO Auto-generated catch block
17
e.printStackTrace();
18
} catch (SecurityException e) {
19
// TODO Auto-generated catch block
20
e.printStackTrace();
21
} catch (IllegalStateException e) {
22
// TODO Auto-generated catch block
23
e.printStackTrace();
24
} catch (IOException e) {
25
// TODO Auto-generated catch block
26
e.printStackTrace();
27
}
28
}
29
30
public void playMusic(Uri uri) throws IllegalArgumentException, SecurityException, IllegalStateException, IOException{
31
MediaPlayer mp = new MediaPlayer();
32
mp.setDataSource(this, uri);
33
mp.prepare();
34
mp.start();
35
}
36
}
2. 在AndroidManifest 注册TestActivity
1
<activity android:name=".TestActivity" android:label="TestActivity">
2
<intent-filter>
3
<action android:name="android.intent.action.GET_CONTENT" />
4
<category android:name="android.intent.category.DEFAULT" />
5
<category android:name="android.intent.category.OPENABLE" />
6
<data android:mimeType="audio/music1" />
7
</intent-filter>
8
</activity>
3. 使用TestActivity
1
public void sendChooser(){
2
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
3
intent.setDataAndType(Uri.parse("file:///sdcard/DCIM/cc.mp3"),"audio/music1");
4
startActivity(Intent.createChooser(intent, "Select music1 app"));
5
}
4. emulator 运行截图: