图片缩放时java.lang.IllegalArgumentException: pointerIndex out of range解决方案

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06-03 20:45:24.143: E/AndroidRuntime(1230): FATAL EXCEPTION: main
06-03 20:45:24.143: E/AndroidRuntime(1230): java.lang.IllegalArgumentException: pointerIndex out of range
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.MotionEvent.nativeGetAxisValue(Native Method)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.MotionEvent.getX(MotionEvent.java:1981)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.support.v4.view.MotionEventCompatEclair.getX(MotionEventCompatEclair.java:32)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.support.v4.view.MotionEventCompat$EclairMotionEventVersionImpl.getX(MotionEventCompat.java:91)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.support.v4.view.MotionEventCompat.getX(MotionEventCompat.java:219)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.support.v4.view.ViewPager.onInterceptTouchEvent(ViewPager.java:1768)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1935)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2289)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2032)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2289)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2032)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2289)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2032)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2289)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2032)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2289)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2032)
06-03 20:45:24.143: E/AndroidRuntime(1230): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2020)
06-03 20:45:24.143: E/AndroidRuntime(1230): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1470)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.app.Activity.dispatchTouchEvent(Activity.java:2471)
06-03 20:45:24.143: E/AndroidRuntime(1230): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1968)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.View.dispatchPointerEvent(View.java:7396)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3251)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3196)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4238)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4217)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4309)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:163)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:4288)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:4328)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.Choreographer.doCallbacks(Choreographer.java:555)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.Choreographer.doFrame(Choreographer.java:523)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.os.Handler.handleCallback(Handler.java:615)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.os.Handler.dispatchMessage(Handler.java:92)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.os.Looper.loop(Looper.java:137)
06-03 20:45:24.143: E/AndroidRuntime(1230): at android.app.ActivityThread.main(ActivityThread.java:4803)
06-03 20:45:24.143: E/AndroidRuntime(1230): at java.lang.reflect.Method.invokeNative(Native Method)
06-03 20:45:24.143: E/AndroidRuntime(1230): at java.lang.reflect.Method.invoke(Method.java:511)
06-03 20:45:24.143: E/AndroidRuntime(1230): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
06-03 20:45:24.143: E/AndroidRuntime(1230): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
06-03 20:45:24.143: E/AndroidRuntime(1230): at dalvik.system.NativeStart.main(Native Method)
06-03 20:45:26.773: E/Trace(1281): error opening trace file: No such file or directory (2)

一个问题，两天时间，搜破了百度没有啥成效。只有这点东西,到处转的，没有说明怎么用。帮助不大！百度上仅有的点内容如下：

=========================================================================================================

在做多点触控放大缩小，操作自己所绘制的图形时发生这个异常，如果是操作图片的放大缩小多点触控不会出现这个错误
 
这个bug是Android系统原因   所以第一种方式是：
 
修改frameworks\base\core\jni\android_view_MotionEvent.cpp的android_view_MotionEvent_nativeGetAxisValue方法
 
注释掉
[java]
if (!validatePointerIndex(env, pointerIndex, pointerCount)) {return 0;｝ 
改完后需重新编译整个系统，然后替换lib库，重新编译整个系统一般需要半个多小时，这个方法就比较麻烦了
 
第二种方法是：捕获IllegalArgumentException（非法参数异常）异常 即如
[java] 
private float spacing(MotionEvent event) { 
        try { 
        x = event.getX(0) - event.getX(1); 
        y = event.getY(0) - event.getY(1); 
    } catch (IllegalArgumentException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
    } 
    第二种方法简单有效

========================================================================================================

这种方法我不会用，不知道该用在哪儿。

接着用谷歌搜索，顺着终于找到了解决方案。经历了以下网站：

http://stackoverflow.com/questions/6919292/pointerindex-out-of-range-android-multitouch

https://code.google.com/p/android/issues/detail?id=18990

https://github.com/chrisbanes/PhotoView/issues/31

上面是搜索的过程，现在把精华内容拣出来:思路是自定义ViewPager，重写onTouchEvent 和onInterceptTouchEvent。具体见下：

It's the android ViewPager's bug
stackoverflow's report: http://stackoverflow.com/questions/6919292/pointerindex-out-of-range-android-multitouch
android's report: http://code.google.com/p/android/issues/detail?id=18990

My simple's method to fix this bug:
You can extends the ViewPager class, your own ViewPager should override the onTouchEvent and the onInterceptTouchEvent methods, and try-catch the IllegalArgumentException exception. Then use your own ViewPager class in layout or others you want.

Examples：

1. /** Custom your own ViewPager to extends support ViewPager. java source: */
2. /** Created by azi on 2013-6-21.  */
3. package com.chaokuadi.android.support.view;
4. import android.content.Context;
5. import android.util.AttributeSet;
6. import android.view.MotionEvent;
7. public class ViewPagerFixed extends android.support.v4.view.ViewPager {
8. public ViewPagerFixed(Context context) {
9. super(context);
10. }
11. public ViewPagerFixed(Context context, AttributeSet attrs) {
12. super(context, attrs);
13. }
14. @Override
15. public boolean onTouchEvent(MotionEvent ev) {
16. try {
17. return super.onTouchEvent(ev);
18. } catch (IllegalArgumentException ex) {
19. ex.printStackTrace();
20. }
21. return false;
22. }
23. @Override
24. public boolean onInterceptTouchEvent(MotionEvent ev) {
25. try {
26. return super.onInterceptTouchEvent(ev);
27. } catch (IllegalArgumentException ex) {
28. ex.printStackTrace();
29. }
30. return false;
31. }
32. }

1. /** ViewPager layout */
2. <?xml version="1.0" encoding="utf-8"?>
3. <com.chaokuaidi.android.support.view.ViewPagerFixed xmlns:android="http://schemas.android.com/apk/res/android"
4. android:id="@+id/pager"
5. android:layout_width="fill_parent"
6. android:layout_height="fill_parent" />