android打开系统的应用

startActivity(new Intent(android.provider.Settings.ACTION_SETTINGS));
startActivity( i );

Intent i = new Intent( android.provider.Settings.ACTION_LOCALE_SETTINGS );
startActivity( i );

Intent galleryIntent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
this.startActivityForResult(galleryIntent, PICK_IMAGE_REQUEST);

Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,
"选择图片"), PICK_IMAGE_REQUEST);