Android代码中动态设置图片的大小（自动缩放），位置

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="${relativePackage}.${activityClass}" >
    <ImageView
        android:id="@+id/image01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:scaleType="fitXY"
        android:src="@drawable/aabb" />

</RelativeLayout>

 

 

public class MainActivity extends Activity {

    private ImageView image;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        image = (ImageView)findViewById(R.id.image01);       

        //设置图片的位置

        MarginLayoutParams margin9 = new MarginLayoutParams(

                image.getLayoutParams());

        margin9.setMargins(400, 10, 0, 0);//在左边距400像素，顶边距10像素的位置显示图片

        RelativeLayout.LayoutParams layoutParams9 = new RelativeLayout.LayoutParams(margin9);

        layoutParams9.height = 600;//设置图片的高度

        layoutParams9.width = 800; //设置图片的宽度

        image.setLayoutParams(layoutParams9);

    }

}