动态的获取和设置ImageView的宽度和高度

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package com.pic;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.ViewGroup.LayoutParams;import android.widget.ImageView;public class PicTest extends Activity {        private final String TAG = "Pictrue Test!!!";        private ImageView image;        private int height = 0;        private int width = 0;               @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                image = (ImageView)findViewById(R.id.ImageView01);        //height = image.getHeight();        //width = image.getWidth();        //Log.d(TAG, "height: " + height);        //Log.d(TAG, "width: " + width);                        LayoutParams para;        para = image.getLayoutParams();                Log.d(TAG, "layout height0: " + para.height);        Log.d(TAG, "layout width0: " + para.width);                para.height = 300;        para.width = 300;        image.setLayoutParams(para);                Log.d(TAG, "layout height: " + para.height);        Log.d(TAG, "layout width: " + para.width);            }