Android 启动第三方程序的方法总结
方法一：
Intent intent = new Intent(); intent.setClassName(<package name>, <class name>); startActivity(intent);
方法二：
Intent i=new Intent; ComponentName com= new ComponentName(<Package Name> , <Calss Name>); i.setComponent(com); startActivity(i);
启动媒体库
Intent i = new Intent();
ComponentName comp = new ComponentName("com.Android.camera","com.android.camera.GalleryPicker");
i.setComponent(comp);
i.setAction("android.intent.action.VIEW");
startActivity(i);
启动相机
Intent mIntent = new Intent();
ComponentName comp = new ComponentName("com.android.camera","com.android.camera.Camera");
mIntent.setComponent(comp);
mIntent.setAction("android.intent.action.VIEW");
startActivity(mIntent);
启动htmlviewer,并打开指定的一个文件 注意TXT不能是ANSI的，否则会乱码
Intent intent = new Intent();
ComponentName cn = new ComponentName("com.android.htmlviewer", "com.android.htmlviewer.HTMLViewerActivity");
intent.setComponent(cn);
Uri uri = Uri.fromFile(new File("/sdcard/demo.txt"));
intent.setDataAndType(uri, "text/plain");
startActivity(intent);
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