ActivityGroup中显示不同Activity的例子

public class BeginActivity extends ActivityGroup {

private LinearLayout mcontainnerLayout;
private Gallery mGalleryMain;
private LocalActivityManager mActivityManager;
private ImageButton mButton1;
private ImageButton mButton2;
private ImageButton mButton3;
private GalleryMainAdapter mGalleryMainAdpter;



/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);

initView();
mActivityManager = this.getLocalActivityManager();
}

private void initView(){
mcontainnerLayout = (LinearLayout)findViewById(R.id.containnerLayout);
mGalleryMain = (Gallery)findViewById(R.id.gallery_main);
mButton1 = (ImageButton)findViewById(R.id.imageButton1);
mButton2 = (ImageButton)findViewById(R.id.imageButton2);
mButton3 = (ImageButton)findViewById(R.id.imageButton3);
mButton1.setOnClickListener(mOnClickListener);
mButton2.setOnClickListener(mOnClickListener);
mButton3.setOnClickListener(mOnClickListener);

mGalleryMainAdpter = new GalleryMainAdapter(BeginActivity.this);
mGalleryMain.setAdapter(mGalleryMainAdpter);
mGalleryMain.setSelection(1);
}

private OnClickListener mOnClickListener = new OnClickListener(){

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.imageButton1:
Intent intent1 = new Intent(BeginActivity.this,ImageViewActivity.class);
View mView1 = mActivityManager.startActivity(null, intent1).getDecorView();
BeginActivity.this.mcontainnerLayout.removeAllViews();
BeginActivity.this.mcontainnerLayout.addView(mView1);
break;

case R.id.imageButton2:
Intent intent2 = new Intent(BeginActivity.this,ImageListActivity.class);
View mView2 = mActivityManager.startActivity(null, intent2).getDecorView();
BeginActivity.this.mcontainnerLayout.removeAllViews();
BeginActivity.this.mcontainnerLayout.addView(mView2);
break;

case R.id.imageButton3:
Intent intent3 = new Intent(BeginActivity.this,ImageListActivity.class);
startActivity(intent3);
break;

default:
break;
}
}
};


}//class