android获取手机屏幕分辨率

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        final DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        final EditText et=(EditText)this.findViewById(R.id.EditText01);//EditText对象
        final EditText ett=(EditText)this.findViewById(R.id.EditText02);//EditText对象
        Button ok=(Button)this.findViewById(R.id.Button01);//按钮对象
       
        ok.setOnClickListener
        (
         new OnClickListener()
         {
    @Override
    public void onClick(View v) {
     // TODO Auto-generated method stub
     et.setText(dm.heightPixels+"");
     ett.setText(dm.widthPixels+"");
    }
          
         }
        );
    }