@Override 

  public void onCreate(Bundle savedInstanceState) { 

      super.onCreate(savedInstanceState); 

      setContentView(R.layout.main); 

      final ImageView p_w_picpathView = (ImageView) findViewById(R.id.p_w_picpathview);       

      int w = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED); 

      int h = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED); 

      p_w_picpathView.measure(w, h); 

      int height =p_w_picpathView.getMeasuredHeight();

      int width =p_w_picpathView.getMeasuredWidth();

      textView.append("\n"+height+","+width);

      System.out.println("执行完毕.."+System.currentTimeMillis()); 

  }

//------------------------------------------------方法一 

int w = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED); 

int h = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED); 

p_w_picpathView.measure(w, h); 

int height =p_w_picpathView.getMeasuredHeight(); 

int width =p_w_picpathView.getMeasuredWidth(); 

textView.append("\n"+height+","+width); 

//-----------------------------------------------方法二 

ViewTreeObserver vto = p_w_picpathView.getViewTreeObserver(); 

vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { 

    public boolean onPreDraw() { 

        int height = p_w_picpathView.getMeasuredHeight(); 

        int width = p_w_picpathView.getMeasuredWidth(); 

        textView.append("\n"+height+","+width); 

        return true; 

    } 

}); 

//-----------------------------------------------方法三    

ViewTreeObserver vto2 = p_w_picpathView.getViewTreeObserver();   

vto2.addOnGlobalLayoutListener(new OnGlobalLayoutListener() { 

    @Override   

    public void onGlobalLayout() { 

        p_w_picpathView.getViewTreeObserver().removeGlobalOnLayoutListener(this);   

        textView.append("\n\n"+p_w_picpathView.getHeight()+","+p_w_picpathView.getWidth()); 

    }   

});