android之Itent.ACTION_PICK Intent.ACTION_GET_CONTENT妙用
你是不是很多時候，想從彈出的電話本姓名列表中中查詢到某個人，然後再獲取該人的詳細資訊呢？
你是不是想選擇從彈出的列表中選擇一張圖片，然後將其進行進一步的操作呢？
如果，你想，那你是不是很像知道，我們應該怎麼讓其彈出來一張選擇列表，又應該怎麼程式碼實現後邊的操作呢？
Itent.ACTION_PICK Intent.ACTION_GET_CONTENT 兩者都可以完成類似的功能，讓我們一起來看下例子：
第一：Intent.ACTION_PICK
首先新增一個許可權：<uses-permission android:name="android.permission.READ_CONTACTS"/>
發起一個 Contact Picker
startActivityForResult(intent, PICK_CONTACT);
重寫方法
@Override
public void onActivityResult(int reqCode, int resultCode, Intent data)
{
super.onActivityResult(reqCode, resultCode, data);
switch (reqCode) {
case (PICK_CONTACT) :
if (resultCode == Activity.RESULT_OK) {
Uri contactData = data.getData();
Cursor c = managedQuery(contactData, null, null, null, null);
if (c.moveToFirst()) {
String name = c.getString(c.getColumnIndexOrThrow(People.NAME));
// TODO Whatever you want to do with the selected contact name.
}
}
break;
}
}
例如
String[] columns = new String[] {People.NAME};
int[] names = new int[] {R.id.row_entry};
mAdapter = new SimpleCursorAdapter(this, R.layout.mycontacts, C, columns, names）；
setListAdapter(mAdapter);
- Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
- intent.setType("audio/*");
- startActivity(Intent.createChooser(intent, "Select music"));
執行之 會彈出一個對話方塊 效果為：
1. 定義TestActivity 用於根據傳入Uri 播放目標
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
<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
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 執行截圖：
此外：
//選擇圖片 requestCode 返回的標識
Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT); //"android.intent.action.GET_CONTENT"
innerIntent.setType(contentType); //檢視型別 String IMAGE_UNSPECIFIED = "image/*";
Intent wrapperIntent = Intent.createChooser(innerIntent, null);
((Activity) context).startActivityForResult(wrapperIntent, requestCode);
//視訊
Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT);
innerIntent.setType(contentType); //String VIDEO_UNSPECIFIED = "video/*";
Intent wrapperIntent = Intent.createChooser(innerIntent, null);
((Activity) context).startActivityForResult(wrapperIntent, requestCode);
//新增音訊
Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT);
innerIntent.setType(contentType); //String VIDEO_UNSPECIFIED = "video/*";
Intent wrapperIntent = Intent.createChooser(innerIntent, null);
((Activity) context).startActivityForResult(wrapperIntent, requestCode);
//錄音
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType(ContentType.AUDIO_AMR); //String AUDIO_AMR = "audio/amr";
intent.setClassName("com.android.soundrecorder",
"com.android.soundrecorder.SoundRecorder");
((Activity) context).startActivityForResult(intent, requestCode);
//拍攝視訊
int durationLimit = getVideoCaptureDurationLimit(); //SystemProperties.getInt("ro.media.enc.lprof.duration", 60);
Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 0);
intent.putExtra(MediaStore.EXTRA_SIZE_LIMIT, sizeLimit);
intent.putExtra(MediaStore.EXTRA_DURATION_LIMIT, durationLimit);
startActivityForResult(intent, REQUEST_CODE_TAKE_VIDEO);
//拍照 REQUEST_CODE_TAKE_PICTURE 為返回的標識
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); //"android.media.action.IMAGE_CAPTURE";
intent.putExtra(MediaStore.EXTRA_OUTPUT, Mms.ScrapSpace.CONTENT_URI); // output,Uri.parse("content://mms/scrapSpace");
startActivityForResult(intent, REQUEST_CODE_TAKE_PICTURE);