如何获得Android的System Bar’s Height

package com.sample.layouttest;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.View.OnLayoutChangeListener;public class Main extends Activity implements OnLayoutChangeListener {    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        View newView = getLayoutInflater().inflate(R.layout.main, null);    newView.addOnLayoutChangeListener(this);    setContentView(newView);    }    @Override    public void onLayoutChange(View view, int left, int top, int right,            int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {        Log.d("LayoutTest","left="+left+", top="+top+", right="+right+", bottom="+bottom);    }}

On a Motorola Xoom running Android 3.1 (as well as a Samsung Galaxy 10.1V running 3.0), the output from the onLayoutChange method when entering portrait mode is :

05-24 15:11:43.047: DEBUG/LayoutTest(8658): left=0, top=0, right=800, bottom=1232

and when entering landscape :

05-24 15:13:18.837: DEBUG/LayoutTest(8658): left=0, top=0, right=1280, bottom=752

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