import android.app.Activity;import android.graphics.*;import android.graphics.drawable.*;import android.os.Bundle;import android.widget.*;import android.widget.ImageView.ScaleType;public class ImageViewTest extends Activity {        private LinearLayout mainLayout=null;    private ImageView iv=null;        public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        /*mainLayout初始化*/        mainLayout=new LinearLayout(this);        mainLayout.setLayoutParams(new LinearLayout.LayoutParams(-1,-1));        /*iv初始化*/        iv=new ImageView(this);        iv.setLayoutParams(new LinearLayout.LayoutParams(-1,-2));        iv.setScaleType(ScaleType.CENTER);//居中显示                /*加载图片方法1*/        //Drawable d=this.getResources().getDrawable(R.drawable.icon);//此处icon对应drawable文件夹下的icon.png        //iv.setImageDrawable(d);//设置图片                /*加载图片方法2*/        int resId=this.getResources().getIdentifier("icon","drawable",getPackageName());        iv.setImageResource(resId);                /*加载图片方法3，在方法2的基础上生成Bitmap bm*/        //int resId=this.getResources().getIdentifier("icon","drawable", getPackageName());        //Bitmap bm = BitmapFactory.decodeResource(this.getResources(), resId);        //iv.setImageBitmap(bm);                mainLayout.addView(iv);//添加iv        setContentView(mainLayout);//显示manLayout    }}