Android launch code for third-party programs

Method One:Intent Intent = new Intent ();

• intent.setclassname (<package< Span style= "color:black;" > name>, <class  name>);   
• StartActivity (Intent);

Method Two:

2. Intent i=new Intent;
   
4. ComponentName com= New componentname (<package name>, <calss name>);
6. I.setcomponent (COM);
8. StartActivity (i);

Start the Media Library

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);

Start the camera

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);

Start Htmlviewer and open the specified file note that TXT cannot be ANSI, otherwise it will be garbled

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);

Android launch code for third-party programs