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Android 发布时间：2022-04-28 发布网站：大佬教程 code.js-code.com

大佬教程收集整理的这篇文章主要介绍了android – 在触摸时更改gridview中项目的背景颜色，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。

我有一个gridView布局,其中填充了textView元素.我有一个gridView的onTouch()实现,其中被触摸的单元格需要更改背景颜色.下面是我的代码,但它不起作用,当我触摸时VM关闭. @H_262_5@ @H_262_5@

gridView.setOnTouchListener(new OnTouchListener() {
        public Boolean onTouch(View v,MotionEvent mE) {

            int action = me.getActionMasked();
            float currentXPosition = me.getX();
            float currentYPosition = me.getY();
            int position = gridView.pointToPosition((int) currentXPosition,(int) currentYPosition);

            // Change the color of the key pressed
            ((TextView) gridView.getItemAtPosition(position)).setBACkgroundColor(Color.RED);
            return true;
    }
}@H_696_8@ 
 @H_262_5@编辑：Logcat跟踪 
 @H_262_5@ 
 12-10 15:34:28.081: E/InputEventReceiver(829): Exception dispatching input event.
12-10 15:34:28.081: E/messageQueue-JNI(829): Exception in messageQueue callBACk: handleReceiveCallBACk
12-10 15:34:28.221: E/messageQueue-JNI(829): java.lang.ClassCastException: java.lang.String cAnnot be cast to android.widget.TextView
12-10 15:34:28.221: E/messageQueue-JNI(829):    at com.example.Helloworld.GridViewActivity$1.onTouch(GridViewActivity.java:62)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.View.dispatchTouchEvent(View.java:7122)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2170)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1905)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1925)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1379)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.app.Activity.dispatchTouchEvent(Activity.java:2396)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1873)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.View.dispatchPointerEvent(View.java:7307)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3174)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3119)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewRootImpl.doprocessInputEvents(ViewRootImpl.java:4155)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4134)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4226)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.os.messageQueue.nativePollOnce(Native Method)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.os.messageQueue.next(messageQueue.java:125)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.os.Looper.loop(Looper.java:124)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at android.app.ActivityThread.main(ActivityThread.java:4745)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at java.lang.reflect.Method.invokeNative(Native Method)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at java.lang.reflect.Method.invoke(Method.java:511)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-10 15:34:28.221: E/messageQueue-JNI(829):    at dalvik.system.NativeStart.main(Native Method)
12-10 15:34:28.263: D/AndroidRuntime(829): ShutTing down VM
12-10 15:34:28.263: W/dalvikvm(829): threadid=1: thread exiTing with uncaught exception (group=0x40a13300)
12-10 15:34:28.362: E/AndroidRuntime(829): FATAL EXCEPTION: main
12-10 15:34:28.362: E/AndroidRuntime(829): java.lang.ClassCastException: java.lang.String cAnnot be cast to android.widget.TextView
12-10 15:34:28.362: E/AndroidRuntime(829):  at com.example.Helloworld.GridViewActivity$1.onTouch(GridViewActivity.java:62)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.View.dispatchTouchEvent(View.java:7122)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2170)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1905)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
12-10 15:34:28.362: E/AndroidRuntime(829):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1925)
12-10 15:34:28.362: E/AndroidRuntime(829):  at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1379)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.app.Activity.dispatchTouchEvent(Activity.java:2396)
12-10 15:34:28.362: E/AndroidRuntime(829):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1873)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.View.dispatchPointerEvent(View.java:7307)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3174)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3119)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewRootImpl.doprocessInputEvents(ViewRootImpl.java:4155)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4134)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4226)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.os.messageQueue.nativePollOnce(Native Method)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.os.messageQueue.next(messageQueue.java:125)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.os.Looper.loop(Looper.java:124)
12-10 15:34:28.362: E/AndroidRuntime(829):  at android.app.ActivityThread.main(ActivityThread.java:4745)
12-10 15:34:28.362: E/AndroidRuntime(829):  at java.lang.reflect.Method.invokeNative(Native Method)
12-10 15:34:28.362: E/AndroidRuntime(829):  at java.lang.reflect.Method.invoke(Method.java:511)
12-10 15:34:28.362: E/AndroidRuntime(829):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
12-10 15:34:28.362: E/AndroidRuntime(829):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-10 15:34:28.362: E/AndroidRuntime(829):  at dalvik.system.NativeStart.main(Native Method)@H_696_8@

解决方法

实际上,我想通了！ @H_262_5@ @H_262_5@我在这里对错误的返回类型进行类型转换

@H_262_5@

((TextView) gridView.getItemAtPosition(position)).setBACkgroundColor(Color.RED);@H_696_8@ 
 @H_262_5@我真正需要的是@L_607_11@getChildAt而不是getItemAtPosition(返回一个String) 
 @H_262_5@ 
 String s = (String) gridView.getItemAtPosition(position);
TextView tv = (TextView) gridView.getChildAt(position);
tv.setBACkgroundColor(Color.RED);@H_696_8@

大佬总结

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标签：android gridview 中项时更改目的背景触摸颜色

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