我正在尝试使用OnGestureListener在Android中滑动。如果文本超出布局高度，我需要垂直滚动文本。我需要Verical滚动和水平滑动应该一起工作。代码是：
package com.example.gestures;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.Menu;
import android.view.MotionEvent;
import android.widget.TextView;
import android.widget.Toast;
public class Gestures extends Activity implements OnGestureListener {
GestureDetector gDetector;TextView tv;
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 250;
private static final int SWIPE_THRESHOLD_VELOCITY = 200;
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gestures);
gDetector = new GestureDetector(this);
tv=(TextView)findViewById(R.id.tv);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.gestures, menu);
return true;
}
@Override
public boolean onDown(MotionEvent arg0) {
// TODO Auto-generated method stub
Log.d("onDown","In OnDown");
return true;
}
public void rightToLeft() {
//tv.setText("There are subclasses of LayoutParams for different subclasses of ViewGroup. For example, AbsoluteLayout has its own subclass of LayoutParams which adds an X and Y value.");
tv.setText("ssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssALGIERS (Reuters) - Algerian President Abdelaziz Bouteflika, who suffered a stroke last year, has been in a Paris hospital since Monday for a long-planned check-up and he is making steady progress, the state news agency APS said on Tuesday.Algerians vote for a new president in April. Bouteflika, 76, has yet to announce whether he will run again after more than 10 years at the helm of the major North African oil producer.To complete his health assessment, started in Algiers, and under a routine medical control ... planned since June 2013, the President of the Republic Abdelaziz Bouteflika is staying at Val-de-Grace hospital, it said. The president's health is improving certainly and progressively.APS, citing a presidential statement, said Bouteflika would remain at the hospital until Friday.A veteran of Algeria's independence war against France, Bouteflika suffered a stroke in early 2013, forcing him to be rushed to hospital in France. He returned to Algeria in July to convalesce and has made only a few public appearances recently.");
}
public void lefttoRight() {
tv.setText("leftToRight LayoutParams are used by views to tell their parents how they want to be laid out. See ViewGroup Layout Attributes for a list of all child view attributes that this class supports. ");
}
@Override
public boolean onFling(MotionEvent start, MotionEvent finish, float velocityX,
float velocityY) {
// TODO Auto-generated method stub
//TextView t=(TextView)findViewById(R.id.tv);
/*if(start.getRawX() < finish.getRawX())
{
Log.d("onFling","in inFling");
}
else if(start.getRawX()>finish.getRawX())
{
Log.d("onFLing","in onFling");
}*/
if (Math.abs(start.getY() - finish.getY()) > SWIPE_MAX_OFF_PATH)
return false;
// right to left swipe
if(start.getX() - finish.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
lefttoRight();
}
else if (finish.getX() - start.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
rightToLeft();
}
return true;
}
@Override
public boolean onTouchEvent(MotionEvent me) {
return gDetector.onTouchEvent(me);
}
@Override
public void onLongPress(MotionEvent arg0) {
// TODO Auto-generated method stub
Log.d("onLongPress","in onlongpress");
}
@Override
public void onShowPress(MotionEvent arg0) {
// TODO Auto-generated method stub
Log.d("onShowPress","in onShowPress");
}
@Override
public boolean onSingleTapUp(MotionEvent arg0) {
// TODO Auto-generated method stub
Log.d("onSingleTapup","in onsingletapup");
return true;
}
@Override
public boolean onScroll(MotionEvent arg0, MotionEvent arg1, float arg2,
float arg3) {
// TODO Auto-generated method stub
return false;
}
}
xml文件（activity_gestures.xml）：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".Gestures" >
<ScrollView
android:id="@+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
</LinearLayout>
</ScrollView>
</RelativeLayout>
问题是有时滚动工作正常，滑动工作不正常。请让我知道如何解决这个问题。谢谢。
答案 0 :(得分：0)
通过扩展自定义ScrollView并实现dispatchTouchEvent来创建自定义ScrollView。
我们开始跟踪ACTION_DOWN中的触摸（在场景上的像素位置）。当我们看到它是水平滑动时，我们不会调用super.dispatchTouchEvent( event ) - 这将执行默认的onTouch路由并使某些子视图也消耗水平滑动 - 但是在{onTouchEvent( event )中调用ACTION_MOVE {1}}以及ACTION_UP。
public class MyScrollView extends ScrollView {
private float mLastX;
private float mLastY;
private final int mTouchSlop = ViewConfiguration.get( getContext() ).getScaledTouchSlop();
private float mStartX;
public ScrollView( Context context ) {
super( context );
}
public ScrollView( Context context, AttributeSet attrs ) {
super( context, attrs );
}
@Override
public boolean dispatchTouchEvent( MotionEvent event ) {
switch( event.getAction() ) {
case MotionEvent.ACTION_DOWN:
mLastX = event.getX();
mLastY = event.getY();
mStartX = event.getX();
break;
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP:
onTouchEvent( event );
break;
case MotionEvent.ACTION_MOVE:
float x = event.getX();
float y = event.getY();
float xDelta = x - mLastX;
float xDeltaAbs = Math.abs( xDelta );
float yDeltaAbs = Math.abs( y - mLastY );
float xDeltaTotal = x - mStartX;
if( Math.abs( xDeltaTotal ) > mTouchSlop )
if( xDeltaAbs > yDeltaAbs )
return onTouchEvent( event );
}
return super.dispatchTouchEvent( event );
}
}
我只是用ViewPager而不是ScrollVIew尝试过这个，但在同样的情况下这应该可行