Android 2.2 使用 ACTION_UP,而 2.1 则不使用(在嵌套滚动视图中)。我使用的是旧错误吗?
我在包含在 ScrollView 中的 HorizontalScrollView 中有自定义视图,当触摸点已移动但未完成滚动时,即当视图小于或等于窗口大小时,我想对 onTouchEvent 中的 ACTION_UP 执行操作。单次触摸而不移动会给出 ACTION_UP ,因为它应该。
当在 2.1 下运行(以下)代码时,我按预期得到 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)。
我是否不小心在 2.1 版本中使用了一个“有效的错误”,并且已在 2.2 版本中修复,或者这是一个新错误?有解决方法吗?
请参阅以下 logcat:
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,
main.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>
视图:
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);
}
}
活动:
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);
}
}
I have custom view in a HorizontalScrollView wrapped in a ScrollView and I want to act on ACTION_UP in onTouchEvent when the touch point has been moved but no scroll has been done, i.e. when the view is smaller than or equal to the window size. A single touch without move gives ACTION_UP as it should.
When running the (following) code under 2.1 I get ACTION_UP as expected. When running the same code on 2.2 I do not get the ACTION_UP (I have tested with both SDK 2.1 and 2.2 on the 2.2 emulator).
Have I accidentally used a "bug that works" in the 2.1 version and has been fixed for 2.2 or is this a new error? Is there a workaround?
See the following logcat:
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,
main.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>
The view:
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);
}
}
The 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);
}
}
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评论(1)
好吧,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
旧代码
等等...
Ok so my workaround is to use an OnTouchListener if the android version is above eclair and use the old code otherwise.
When registering
The old code
and so on...