private boolean flag;
public void onClick(View v){
 if(flag){
  mImageView.setImageResource(R.drawable.xx1);  
 }else{
  mImageView.setImageResource(R.drawable.xx2);
 }
 flag = !flag;
}

<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="SelectorImageView">
 <attr name="selector_src" format="reference"/>//选中的src图片属性
 <attr name="checked" format="boolean"/>
</declare-styleable>
</resources>

public class SelectorImageView extends ImageView implements Checkable {
 private boolean isChecked;
 private Drawable mSelectorDrawable;
 private Drawable mDrawable;
 public SelectorImageView(Context context) {
  this(context, null);
 }
 public SelectorImageView(Context context, AttributeSet attrs) {
  this(context, attrs, 0);
 }
 public SelectorImageView(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
  /**获取默认属性src的Drawable并用成员变量保存*/
  mDrawable = getDrawable();
  final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SelectorImageView);
  /**获取自定义属性selector_src的Drawable并用成员变量保存*/
  Drawable d = a.getDrawable(R.styleable.SelectorImageView_selector_src);
  mSelectorDrawable = d;
  /**获取自定义属性checked的值并用成员变量保存*/
  isChecked = a.getBoolean(R.styleable.SelectorImageView_checked, false);
  setChecked(isChecked);
  if (d != null && isChecked) {
  /**如果在布局中设置了selector_src与checked = true，我们就要设置ImageView的图片为mSelectorDrawable */
   setImageDrawable(d);
  }
  a.recycle();
 }
 @Override
 public void setImageDrawable(Drawable drawable) {
  super.setImageDrawable(drawable);
 }
 @Override
 public void setChecked(boolean checked) {
  this.isChecked = checked;
 }
 @Override
 public boolean isChecked() {
  return isChecked;
 }
 @Override
 public void toggle() {
 /**此处依据是否选中来设置不同的图片*/
  if (isChecked()) {
   setImageDrawable(mSelectorDrawable);
  } else {
   setImageDrawable(mDrawable);
  }
 }
 public void toggle(boolean checked){
 /**外部通过调用此方法传入checked参数，然后把值传入给setChecked（）方法改变当前的选中状态*/
  setChecked(checked);
  toggle();
 }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 android:layout_width="match_parent"
 android:layout_height="match_parent">
 <com.qjay.adf.widget.SelectorImageView
  android:id="@+id/iv"
  android:layout_width="100dp"
  android:layout_height="100dp"
  app:selector_src="@mipmap/checked"
  android:src="@mipmap/no_checked"/>
</LinearLayout>

public class MainActivity extends Activity {
 private SelectorImageView iv;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  iv = (SelectorImageView) findViewById(R.id.iv);
  iv.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    iv.toggle(!iv.isChecked());
   }
  });
 }
}