public class MyImageView extends ImageView {
  public MyImageView(Context context, AttributeSet attrs) {
    super(context, attrs);
  }
  public MyImageView(Context context) {
    super(context);
  }
  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    System.out.println("onMeasure 我被调用了"+System.currentTimeMillis());
  }
  @Override
  protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    System.out.println("onDraw 我被调用了"+System.currentTimeMillis());
  }
}

<com.test.MyImageView
  android:id="@+id/imageview"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:src="@drawable/test" />

@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  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);
imageView.measure(w, h);
int height =imageView.getMeasuredHeight();
int width =imageView.getMeasuredWidth();
textView.append("\n"+height+","+width);
//-----------------------------------------------方法二
ViewTreeObserver vto = imageView.getViewTreeObserver();
vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
  public boolean onPreDraw() {
    int height = imageView.getMeasuredHeight();
    int width = imageView.getMeasuredWidth();
    textView.append("\n"+height+","+width);
    return true;
  }
});
//-----------------------------------------------方法三
ViewTreeObserver vto2 = imageView.getViewTreeObserver();
vto2.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
  @Override
  public void onGlobalLayout() {
    imageView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
    textView.append("\n\n"+imageView.getHeight()+","+imageView.getWidth());
  }
});

@Override
 public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.main);
   final ImageView imageView = (ImageView) findViewById(R.id.imageview);
   //------------------------------------------------方法一
   int w = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
   int h = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
   imageView.measure(w, h);
   int height =imageView.getMeasuredHeight();
   int width =imageView.getMeasuredWidth();
   textView.append("\n"+height+","+width);
   System.out.println("执行完毕.."+System.currentTimeMillis());
 }

@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  final ImageView imageView = (ImageView) findViewById(R.id.imageview);
//-----------------------------------------------方法二
  ViewTreeObserver vto = imageView.getViewTreeObserver();
  vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
    public boolean onPreDraw() {
      int height = imageView.getMeasuredHeight();
      int width = imageView.getMeasuredWidth();
      textView.append("\n"+height+","+width);
      return true;
    }
  });
}

<ScrollView
  android:layout_width="wrap_content"
  android:layout_height="wrap_content" >
  <TextView
    android:id="@+id/text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />
</ScrollView>

@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  final ImageView imageView = (ImageView) findViewById(R.id.imageview);
//-----------------------------------------------方法二
  ViewTreeObserver vto = imageView.getViewTreeObserver();
  vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
    public boolean onPreDraw() {
      int height = imageView.getMeasuredHeight();
      int width = imageView.getMeasuredWidth();
      textView.append("\n"+height+","+width);
      return true;
    }
  });
}

@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  final ImageView imageView = (ImageView) findViewById(R.id.imageview);
  //-----------------------------------------------方法三
  ViewTreeObserver vto2 = imageView.getViewTreeObserver();
  vto2.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
      imageView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
      textView.append("\n\n"+imageView.getHeight()+","+imageView.getWidth());
    }
  });
}