Intent.createChooser(ntent target, CharSequence title)android
其實 你們對該功能第一影響就是ApiDemo 裏面的 其只有區區幾行代碼 提取爲:app
Java代碼ide
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);this
intent.setType("audio/*");get
startActivity(Intent.createChooser(intent, "Select music"));it
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);io
intent.setType("audio/*");class
startActivity(Intent.createChooser(intent, "Select music"));file
執行之 會彈出一個對話框 效果爲:im
其實 對於這段代碼 你們應該都能猜出什麼意思 現本身模擬並理解之
[代碼]
1. 定義TestActivity 用於根據傳入Uri 播放目標
Java代碼
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);
Intent.createChooser(ntent target, CharSequence title)
其實 你們對該功能第一影響就是ApiDemo 裏面的 其只有區區幾行代碼 提取爲:
Java代碼
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("audio/*");
startActivity(Intent.createChooser(intent, "Select music"));
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("audio/*");
startActivity(Intent.createChooser(intent, "Select music"));
執行之 會彈出一個對話框 效果爲:
其實 對於這段代碼 你們應該都能猜出什麼意思 現本身模擬並理解之
[代碼]
1. 定義TestActivity 用於根據傳入Uri 播放目標
Java代碼
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();
}
}
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 註冊TestActivity
Java代碼
< 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>
< 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代碼
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"));
}
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 運行截圖: