Android 2.2 使用 ACTION_UP 而 2.1 不使用(在嵌套 ScrollView 中)。我使用的是旧错误吗？

Question

我在 Horizo​​ntalScrollView 中有自定义 View ，包裹在 ScrollView 中，当触摸点已移动但未完成滚动时，我想在 onTouchEvent 中对 ACTION_UP 进行操作，即当 View 小于或等于窗口大小时.不移动的单次触摸会按应有的方式提供 ACTION_UP。

在 2.1 下运行(以下)代码时，我得到了预期的 ACTION_UP。在 2.2 上运行相同的代码时，我没有得到 ACTION_UP(我已经在 2.2 模拟器上使用 SDK 2.1 和 2.2 进行了测试)。

我是否在 2.1 版本中不小心使用了一个“有效的错误”并且已在 2.2 版本中得到修复，或者这是一个新错误？有解决方法吗？

请参阅以下日志:

2.1
I/CustomActivityView(  225): ACTION_DOWN at 307.000000,
I/CustomActivityView(  225): ACTION_MOVE at 297.000000,
I/CustomActivityView(  225): ACTION_MOVE at 292.000000,
I/CustomActivityView(  225): ACTION_MOVE at 290.000000,
I/CustomActivityView(  225): ACTION_MOVE at 289.000000,
I/CustomActivityView(  225): ACTION_MOVE at 286.000000,
I/CustomActivityView(  225): ACTION_UP at 286.000000,

2.2
/CustomActivityView(  279): ACTION_DOWN at 249.000000,
/CustomActivityView(  279): ACTION_MOVE at 249.000000,
/CustomActivityView(  279): ACTION_MOVE at 249.000000,
/CustomActivityView(  279): ACTION_MOVE at 249.000000,
/CustomActivityView(  279): ACTION_DOWN at 198.000000,
/CustomActivityView(  279): ACTION_MOVE at 199.000000,
/CustomActivityView(  279): ACTION_MOVE at 207.000000,
/CustomActivityView(  279): ACTION_MOVE at 214.000000,
/CustomActivityView(  279): ACTION_MOVE at 221.000000,

主.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:background="#ffdddddd"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <ScrollView android:id="@+id/ScrollView" android:layout_width="wrap_content" android:layout_height="wrap_content">
        <HorizontalScrollView android:id="@+id/HorizontalScrollView" android:layout_width="wrap_content" android:layout_height="wrap_content">
            <com.example.eventconsumption.CustomActivityView
            android:background="#ffaaaaff"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:id="@+id/CustomActivityView"
            />
        </HorizontalScrollView>
    </ScrollView>
</LinearLayout>

观点:

package com.example.eventconsumption;

import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Display;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;

public class CustomActivityView extends View {
    private static final String TAG = "CustomActivityView";
    private int mSetViewWidth = -1;
    private int mSetViewHeight = -1;
    private int mScreenWidth;
    private int mScreenHeight;

    public CustomActivityView(Context context) {
        super(context);
        init(context);
    }

    public CustomActivityView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    public CustomActivityView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init(context);
    }

    private void init(Context context) {
        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        Display display = windowManager.getDefaultDisplay();
        mScreenWidth = display.getWidth();
        mScreenHeight = display.getHeight();

        setWidthHeight(mScreenWidth / 2, mScreenHeight * 2);
        //setWidthHeight(mScreenWidth * 2, mScreenHeight / 2);
    }

    private void setWidthHeight(int w, int h) {
        mSetViewWidth = w;
        mSetViewHeight = h;
    }

    @Override
    public void draw(Canvas canvas) {
        super.draw(canvas);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        if (mSetViewWidth != -1 && mSetViewHeight != -1) {
            setMeasuredDimension(mSetViewWidth, mSetViewHeight);
        } else {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            Log.i(TAG, String.format("ACTION_DOWN at %f, %f", event.getX(), event.getY()));
            return true;
        case MotionEvent.ACTION_MOVE:
            Log.i(TAG, String.format("ACTION_MOVE at %f, %f", event.getX(), event.getY()));
            break;
        case MotionEvent.ACTION_UP:
            Log.i(TAG, String.format("ACTION_UP at %f, %f", event.getX(), event.getY()));
            return true;
        }

        return super.onTouchEvent(event);
    }
}

Activity :

package com.example.eventconsumption;

import android.app.Activity;
import android.os.Bundle;

public class EventConsumptionTestActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

Answer 1

好的，所以我的解决方法是，如果 android 版本高于 eclair，则使用 OnTouchListener，否则使用旧代码。注册时

if (Build.VERSION.SDK_INT > Build.VERSION_CODES.ECLAIR_MR1) {
    mUseOnTouchListener = true;
    mHorizontalScrollView.setOnTouchListener(new OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            // ACTION_UP check here etc...

旧代码

case MotionEvent.ACTION_UP:
    if (!mUseOnTouchListener) {

等等……