Android(安卓)Intent用法详解
16lz
2022-05-27
如果是从BroadcastReceiver 启动一个新的Activity , 不要忘记i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);public class MyReceiver extends BroadcastReceiver{public static final String action=”acc”;public void onReceive(Context context, Intent intent) {Intent i=new Intent(context,Receivered.class);i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);context.startActivity(i);}}1. 指定act ion 和type// SIM importIntent importIntent = new Intent(Intent.ACTION_VIEW);importIntent.setType(“vnd.android.cursor.item/sim-contact”);importIntent.setClassName(“com.android.phone”, “com.android.phone.SimContacts”);menu.add(0, 0, 0, R.string.importFromSim).setIcon(R.drawable.ic_menu_import_contact).setIntent(importIntent);2. 指定act ion, da ta和type(1)隐式查找type示例代码：uri: content://simcontacts/simPeople/(id)intent = new Intent(“android.intent.action.SIMEDIT”,uri);startActivity(intent);程序会很据data中的uri去查找匹配的type（必须的）provider中的getType()case SIM_PEOPLE_ID:return “vnd.android.cursor.item/sim-contact”;配置文件中的filter设定AndroidManifest.xml也可以自己设定type，但只能使用 setDataAndType()3. 其他设定intent的属性方式Intent setComponent(ComponentName component)Intent setClassName(Context packageContext, String className)Intent setClassName(String packageName, String className)Intent setClass(Context packageContext, Class cls)打开其他APK文件的ACTIVITYIntent mIntent = new Intent();ComponentName comp = new ComponentName(“com.android.a”,”com.android.a.AbcActivity” );mIntent.setComponent(comp);mIntent.setAction(“android.intent.action.MAIN”);startActivity(mIntent);显示网页:1. Uri uri = Uri.parse(“http://www.google.com”);2. Intent it = new Intent(Intent.ACTION_VIEW,uri);3. startActivity(it);显示地图:1. Uri uri = Uri.parse(“geo:38.899533,-77.036476″);2. Intent it = new Intent(Intent.Action_VIEW,uri);3. startActivity(it);路径规划:1. Uri uri = Uri.parse(“http://maps.google.com/maps?f=d&saddr=startLat%20startLng&daddr=endLat%20endLng&hl=en”);2. Intent it = new Intent(Intent.ACTION_VIEW,URI);3. startActivity(it);拨打电话:调用拨号程序1. Uri uri = Uri.parse(“tel:xxxxxx”);2. Intent it = new Intent(Intent.ACTION_DIAL, uri);3. startActivity(it);1. Uri uri = Uri.parse(“tel.xxxxxx”);2. Intent it =new Intent(Intent.ACTION_CALL,uri);3. 要使用这个必须在配置文件中加入发送SMS/MMS调用发送短信的程序1. Intent it = new Intent(Intent.ACTION_VIEW);2. it.putExtra(“sms_body”, “The SMS text”);3. it.setType(“vnd.android-dir/mms-sms”);4. startActivity(it);发送短信1. Uri uri = Uri.parse(“smsto:0800000123″);2. Intent it = new Intent(Intent.ACTION_SENDTO, uri);3. it.putExtra(“sms_body”, “The SMS text”);4. startActivity(it);发送彩信1. Uri uri = Uri.parse(“content://media/external/images/media/23″);2. Intent it = new Intent(Intent.ACTION_SEND);3. it.putExtra(“sms_body”, “some text”);4. it.putExtra(Intent.EXTRA_STREAM, uri);5. it.setType(“image/png”);6. startActivity(it);发送Email1.2. Uri uri = Uri.parse(“mailto:xxx@abc.com”);3. Intent it = new Intent(Intent.ACTION_SENDTO, uri);4. startActivity(it);1. Intent it = new Intent(Intent.ACTION_SEND);2. it.putExtra(Intent.EXTRA_EMAIL, “me@abc.com”);3. it.putExtra(Intent.EXTRA_TEXT, “The email body text”);4. it.setType(“text/plain”);5. startActivity(Intent.createChooser(it, “Choose Email Client”));1. Intent it=new Intent(Intent.ACTION_SEND);2. String[] tos={“me@abc.com”};3. String[] ccs={“you@abc.com”};4. it.putExtra(Intent.EXTRA_EMAIL, tos);5. it.putExtra(Intent.EXTRA_CC, ccs);6. it.putExtra(Intent.EXTRA_TEXT, “The email body text”);7. it.putExtra(Intent.EXTRA_SUBJECT, “The email subject text”);8. it.setType(“message/rfc822″);9. startActivity(Intent.createChooser(it, “Choose Email Client”));添加附件1. Intent it = new Intent(Intent.ACTION_SEND);2. it.putExtra(Intent.EXTRA_SUBJECT, “The email subject text”);3. it.putExtra(Intent.EXTRA_STREAM, “file:///sdcard/mysong.mp3″);4. sendIntent.setType(“audio/mp3″);5. startActivity(Intent.createChooser(it, “Choose Email Client”));播放多媒体//方法1.Uri uri = Uri.parse(“file:///sdcard/song.mp3″);Intent it = new Intent(Intent.ACTION_VIEW, uri);// it.addFlags(it.FLAG_ACTIVITY_NEW_TASK);//非必须选项it.setDataAndType(uri, “audio/mp3″);context.startActivity(it);//方法2.1.2. Intent it = new Intent(Intent.ACTION_VIEW);3. Uri uri = Uri.parse(“file:///sdcard/song.mp3″);4. it.setDataAndType(uri, “audio/mp3″);5. startActivity(it);//方法3. 启动一个播放器并播放一个系统声音1. Uri uri = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, “1″);2. Intent it = new Intent(Intent.ACTION_VIEW, uri);3. startActivity(it);Uninstall 程序1. Uri uri = Uri.fromParts(“package”, strPackageName, null);2. Intent it = new Intent(Intent.ACTION_DELETE, uri);3. startActivity(it);uninstall apk1. Uri uninstallUri = Uri.fromParts(“package”, “xxx”, null);2.3. returnIt = new Intent(Intent.ACTION_DELETE, uninstallUri);install apk1. Uri installUri = Uri.fromParts(“package”, “xxx”, null);2.3. returnIt = new Intent(Intent.ACTION_PACKAGE_ADDED, installUri);play audio1. Uri playUri = Uri.parse(“file:///sdcard/download/everything.mp3″);2.3. returnIt = new Intent(Intent.ACTION_VIEW, playUri);哈，原来你还没贴完，我再加个:1. //发送附件2. Intent it = new Intent(Intent.ACTION_SEND);3. it.putExtra(Intent.EXTRA_SUBJECT, “The email subject text”);4. it.putExtra(Intent.EXTRA_STREAM, “file:///sdcard/eoe.mp3″);5. sendIntent.setType(“audio/mp3″);6. startActivity(Intent.createChooser(it, “Choose Email Client”));market相关market相关再来一个market相关的：market相关1. //搜索应用2. Uri uri = Uri.parse(“market://search?q=pname:pkg_name”);3. Intent it = new Intent(Intent.ACTION_VIEW, uri);4. startActivity(it);5. //where pkg_name is the full package path for an application7. //显示指定应用的详细页面（这个好像不支持了，找不到app_id）8. Uri uri = Uri.parse(“market://details?id=app_id”);9. Intent it = new Intent(Intent.ACTION_VIEW, uri);10. startActivity(it);Uninstall 应用程序1. Uri uri = Uri.fromParts(“package”, strPackageName, null);2. Intent it = new Intent(Intent.ACTION_DELETE, uri);3. startActivity(it); 1、调用其自带的播放器：[java] Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v"); //调用系统自带的播放器 Intent intent = new Intent(Intent.ACTION_VIEW); Log.v("URI:::::::::", uri.toString()); intent.setDataAndType(uri, "video/mp4"); startActivity(intent); 2、使用VideoView来实现：[java] Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v"); VideoView videoView = (VideoView)this.findViewById(R.id.video_view); videoView.setMediaController(new MediaController(this)); videoView.setVideoURI(uri); videoView.start(); videoView.requestFocus(); 3、使用MediaPlayer：[java] package demo.camera; import java.io.IOException; import Android.app.Activity; import Android.media.MediaPlayer; import Android.media.MediaPlayer.OnCompletionListener; import Android.media.MediaPlayer.OnErrorListener; import Android.media.MediaPlayer.OnInfoListener; import Android.media.MediaPlayer.OnPreparedListener; import Android.media.MediaPlayer.OnSeekCompleteListener; import Android.media.MediaPlayer.OnVideoSizeChangedListener; import Android.os.Bundle; import Android.os.Environment; import Android.util.Log; import Android.view.Display; import Android.view.SurfaceHolder; import Android.view.SurfaceView; import Android.widget.LinearLayout; /** * 该实例中使用MediaPlayer完成播放，同时界面使用SurfaceView来实现 * * 这里我们实现MediaPlayer中很多状态变化时的监听器 * * 使用Mediaplayer时，也可以使用MediaController类，但是需要实现MediaController.mediaController接口 * 实现一些控制方法。 * * 然后，设置controller.setMediaPlayer(),setAnchorView(),setEnabled(),show()就可以了，这里不再实现 * @author Administrator * */ public class VideoSurfaceDemo extends Activity implements OnCompletionListener,OnErrorListener,OnInfoListener, OnPreparedListener, OnSeekCompleteListener,OnVideoSizeChangedListener,SurfaceHolder.Callback{ private Display currDisplay; private SurfaceView surfaceView; private SurfaceHolder holder; private MediaPlayer player; private int vWidth,vHeight; //private boolean readyToPlay = false; public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); this.setContentView(R.layout.video_surface); surfaceView = (SurfaceView)this.findViewById(R.id.video_surface); //给SurfaceView添加CallBack监听 holder = surfaceView.getHolder(); holder.addCallback(this); //为了可以播放视频或者使用Camera预览，我们需要指定其Buffer类型 holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); //下面开始实例化MediaPlayer对象 player = new MediaPlayer(); player.setOnCompletionListener(this); player.setOnErrorListener(this); player.setOnInfoListener(this); player.setOnPreparedListener(this); player.setOnSeekCompleteListener(this); player.setOnVideoSizeChangedListener(this); Log.v("Begin:::", "surfaceDestroyed called"); //然后指定需要播放文件的路径，初始化MediaPlayer String dataPath = Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v"; try { player.setDataSource(dataPath); Log.v("Next:::", "surfaceDestroyed called"); } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (IllegalStateException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } //然后，我们取得当前Display对象 currDisplay = this.getWindowManager().getDefaultDisplay(); } @Override public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) { // 当Surface尺寸等参数改变时触发 Log.v("Surface Change:::", "surfaceChanged called"); } @Override public void surfaceCreated(SurfaceHolder holder) { // 当SurfaceView中的Surface被创建的时候被调用 //在这里我们指定MediaPlayer在当前的Surface中进行播放 player.setDisplay(holder); //在指定了MediaPlayer播放的容器后，我们就可以使用prepare或者prepareAsync来准备播放了 player.prepareAsync(); } @Override public void surfaceDestroyed(SurfaceHolder holder) { Log.v("Surface Destory:::", "surfaceDestroyed called"); } @Override public void onVideoSizeChanged(MediaPlayer arg0, int arg1, int arg2) { // 当video大小改变时触发 //这个方法在设置player的source后至少触发一次 Log.v("Video Size Change", "onVideoSizeChanged called"); } @Override public void onSeekComplete(MediaPlayer arg0) { // seek操作完成时触发 Log.v("Seek Completion", "onSeekComplete called"); } @Override public void onPrepared(MediaPlayer player) { // 当prepare完成后，该方法触发，在这里我们播放视频 //首先取得video的宽和高 vWidth = player.getVideoWidth(); vHeight = player.getVideoHeight(); if(vWidth > currDisplay.getWidth() || vHeight > currDisplay.getHeight()){ //如果video的宽或者高超出了当前屏幕的大小，则要进行缩放 float wRatio = (float)vWidth/(float)currDisplay.getWidth(); float hRatio = (float)vHeight/(float)currDisplay.getHeight(); //选择大的一个进行缩放 float ratio = Math.max(wRatio, hRatio); vWidth = (int)Math.ceil((float)vWidth/ratio); vHeight = (int)Math.ceil((float)vHeight/ratio); //设置surfaceView的布局参数 surfaceView.setLayoutParams(new LinearLayout.LayoutParams(vWidth, vHeight)); //然后开始播放视频 player.start(); } } @Override public boolean onInfo(MediaPlayer player, int whatInfo, int extra) { // 当一些特定信息出现或者警告时触发 switch(whatInfo){ case MediaPlayer.MEDIA_INFO_BAD_INTERLEAVING: break; case MediaPlayer.MEDIA_INFO_METADATA_UPDATE: break; case MediaPlayer.MEDIA_INFO_VIDEO_TRACK_LAGGING: break; case MediaPlayer.MEDIA_INFO_NOT_SEEKABLE: break; } return false; } @Override public boolean onError(MediaPlayer player, int whatError, int extra) { Log.v("Play Error:::", "onError called"); switch (whatError) { case MediaPlayer.MEDIA_ERROR_SERVER_DIED: Log.v("Play Error:::", "MEDIA_ERROR_SERVER_DIED"); break; case MediaPlayer.MEDIA_ERROR_UNKNOWN: Log.v("Play Error:::", "MEDIA_ERROR_UNKNOWN"); break; default: break; } return false; } @Override public void onCompletion(MediaPlayer player) { // 当MediaPlayer播放完成后触发 Log.v("Play Over:::", "onComletion called"); this.finish(); } } 更多相关文章
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