Android中不同方向嵌套滑動的解決方式（ListView為樣例）
前言：
就像手機QQ的聊天消息列表。一個縱向滑動的ListView列舉全部消息，但每一條消息能夠橫向滑動。
而默認情況下，僅僅能有一個地方消化處理觸摸事件，要麽ListView吃掉這個事件。要麽子Item中能滑動的部件吃掉。兩者互相沖突。
是否認為非常分裂？實現起來事實上不復雜。
理解了以後，能夠方便延伸到GridView，ViewPager，ScrollView等等滑動控件。
假設對Andoroid觸摸事件傳遞過程不熟悉，請看這裏：
為了最簡單表達實現方法，我以一個LinearLayout為ListView的Item，裏面放了消息的TextView。和一個刪除button
重寫ListView中的Item，也就是LinearLayout的onTouchEvent方法。以監聽橫向滑動和縱向滑動：
1)縱向滑動時。無論
2)橫向滑動時。請求父容器，也即是ListView不要攔截觸摸事件，自己在子View（也就是LinearLayout）裏面處理就好了，當橫向觸摸時間結束(MotionEvent.Action_UP）或者劃出邊界(MotionEvent.Action_CANCEL)時，恢復同意父容器攔截觸摸事件。
先上效果圖
重寫的LinearLayout例如以下：
package ex.oyyj.listviewfulldemo;
import android.animation.Animator;
import android.animation.ObjectAnimator;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.ViewParent;
import android.widget.LinearLayout;
/**
* Created by oyyj on 2015/8/6.
*/
public class HorizontalSlideLayout extends LinearLayout {
private static String TAG = "VerticalSlideLayout";
private int DRAG_X_THROD = 0;
private int SCROLL_X = 0;
private final int ANIM_DURATION = 300;
private static final int SLIDE_TO_LEFT = -1;
private static final int SLIDE_TO_RIGHT = 1;
private int mSlideDirection = 0;
public HorizontalSlideLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
//推斷橫劃的閾值,為了兼容不同尺寸的設備。以dp為單位
DRAG_X_THROD = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 30, context.getResources().getDisplayMetrics());
SCROLL_X = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, context.getResources().getDisplayMetrics());
}
public HorizontalSlideLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public HorizontalSlideLayout(Context context) {
this(context, null, 0);
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
}
int downX, downY;
boolean isNeedToGoBack;
private ObjectAnimator mAnimator;
@Override
public boolean onTouchEvent(MotionEvent ev) {
boolean isInterceptHere = false;
try {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
downX = (int) ev.getX();
downY = (int) ev.getY();
isInterceptHere = true;
if (mAnimator != null) {
mAnimator.cancel();
}
break;
case MotionEvent.ACTION_MOVE:
int dx = (int) Math.abs(ev.getX() - downX);
int dy = (int) Math.abs(ev.getY() - downY);
if (dx > dy && dx > DRAG_X_THROD) {
Log.i(TAG, "橫劃！ 攔截它");
setParentInterceptTouchEvent(true);
isInterceptHere = true;
mSlideDirection = (ev.getX() - downX) > 0 ? SLIDE_TO_RIGHT : SLIDE_TO_LEFT;
if (mSlideDirection == SLIDE_TO_LEFT) {
isNeedToGoBack = true;
playAnimation(SCROLL_X, ANIM_DURATION);
} else if (mSlideDirection == SLIDE_TO_RIGHT && isNeedToGoBack) {
playAnimation(0, ANIM_DURATION);
}
} else if (dy > dx) {
Log.i(TAG, "豎劃！
不攔截");
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
setParentInterceptTouchEvent(false);
isInterceptHere = false;
downX = 0;
downY = 0;
break;
}
} catch (Exception e) {
e.printStackTrace();
}
return isInterceptHere;
}
private void playAnimation(int translationX, int duration) {
if (mAnimator != null) {
mAnimator.cancel();
}
mAnimator = ObjectAnimator.ofInt(this, "scrollX", translationX);
mAnimator.setDuration(duration);
mAnimator.start();
mAnimator.addListener(listener);
}
/* 這個函數非常重要，請求禁止父容器攔截觸摸事件 */
public void setParentInterceptTouchEvent(boolean disallow) {
ViewParent parent = getParent();
if (parent != null) {
parent.requestDisallowInterceptTouchEvent(disallow);
}
}
Animator.AnimatorListener listener = new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animator) {
}
@Override
public void onAnimationEnd(Animator animator) {
mAnimator = null;
}
@Override
public void onAnimationCancel(Animator animator) {
mAnimator = null;
}
@Override
public void onAnimationRepeat(Animator animator) {
}
};
}
貼上具體調用代碼：
activity_main.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:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"
android:background="#ffffff">
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/listView"
android:divider="@drawable/divider"
android:listSelector="@drawable/selector_list_background"
android:layout_centerInParent="true" />
</RelativeLayout>
MainActivity.java
package ex.oyyj.listviewfulldemo;
import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends Activity {
private ListView mlistView;
String[] films = new String[]{
"煎餅俠",
"獵妖記",
"大聖歸來",
"道士下山",
"王朝的女人·楊貴妃",
"梔子花開",
"太平輪(下) ",};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mlistView = (ListView) findViewById(R.id.listView);
final TitleAdapter titleAdapter = new TitleAdapter(LayoutInflater.from(this), films);
mlistView.setAdapter(titleAdapter);
}
private class TitleAdapter extends BaseAdapter {
String[] itemNames;
LayoutInflater inflater;
public TitleAdapter(LayoutInflater _inflater, String[] names) {
inflater = _inflater;
itemNames = names.clone();
}
@Override
public Object getItem(int i) {
return itemNames[i];
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public int getCount() {
return itemNames.length;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
try {
ViewHolder holder = new ViewHolder();
if (view == null ) {
view = inflater.inflate(R.layout.item_layout, viewGroup, false);
holder.title = (TextView) view.findViewById(R.id.item);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
if (holder != null && holder.title != null) {
TextView tv = holder.title;
tv.setText(itemNames[i]);
}
} catch (Exception e) {
e.printStackTrace();
}
return view;
}
private class ViewHolder {
TextView title;
}
}
}
轉自：http://blog.csdn.net/oyyj42/article/details/47333443
Android中不同方向嵌套滑動的解決方式（ListView為樣例）