Android layoutdisplay，layout over layout。

Question

如图所示。我想在布局上方显示星图。我是这种编码的新手。

我的查询是1)是否可以在我的布局端显示星标(图像)？

2) 如果每次点击我的 Activity 时我都想显示星标并显示第二张图片，这可能吗？意味着在同一屏幕上我必须用他们尊重的位置来保存星星。

感谢高级？

Answer 1

像这样:

 public class MyActivity extends Activity implements View.OnTouchListener {
     private RelativeLayout _mainLayout;

     /**
     * Called when the activity is first created.
     */
     @Override
     public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        _mainLayout = (RelativeLayout)findViewById(R.id.canvas);
       _mainLayout.setOnTouchListener(this);
     }

     @Override
     public boolean onTouch(View view, MotionEvent event) {
        final int X = (int) event.getRawX();
        final int Y = (int) event.getRawY();
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                 Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon);
                 ImageView image = new ImageView(this);
                 image.setImageBitmap(bitmap);
                 RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(bitmap.getWidth(), bitmap.getHeight());
                 layoutParams.leftMargin = X - bitmap.getWidth()/2;
                 layoutParams.topMargin = Y - bitmap.getHeight()/2;
                 layoutParams.bottomMargin = -250;
                 layoutParams.rightMargin = -250;
                 image.setLayoutParams(layoutParams);
                 _mainLayout.addView(image);
                 break;
           }
           return false;
      }
 }

主.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:orientation="vertical"
          android:layout_width="fill_parent"
          android:layout_height="fill_parent">

<RelativeLayout
              android:id="@+id/canvas"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:background="@drawable/bg0large"
        >
</RelativeLayout>