本文共 24636 字,大约阅读时间需要 82 分钟。
现在的Android应用,只要有一个什么新的创意,过不了多久,几乎所有的应用都带这个创意。这不,咱们公司最近的一个持续性的项目,想在首页加个从左滑动出来的菜单,我查阅网上资料,并自己摸索,实现了左、右两边都能滑出菜单,并且,左、右菜单中,都可以加ListView等这类需要解决GestureDetector冲突的问题(如在首页面中,含有ListView,上下滚动时,左右不动,相反,左右滑动菜单时,上下不动,听着头就大了吧!)
先上几张图,给大家瞧瞧,对整体有个了解:
图1(首页) 图2(左侧菜单+ListView) 图3(右侧菜单)
一、首页布局:
- <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"
- tools:context=".MainActivity" >
- <!-- 主布局 -->
- <RelativeLayout
- android:id="@+id/mainLayout"
- android:layout_width="match_parent"
- android:layout_height="match_parent">
- <RelativeLayout
- android:id="@+id/titlebar"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:background="#ffffff"
- android:padding="5dip">
- <ImageView
- android:id="@+id/ivMore"
- android:src="@drawable/nav_more_normal"
- android:contentDescription="@string/img_desc"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerVertical="true"
- android:layout_alignParentLeft="true"
- android:layout_marginLeft="10dip"/>
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerHorizontal="true"
- android:layout_centerVertical="true"
- android:text="@string/title"
- android:textSize="20sp"
- android:textColor="#000000"/>
- <ImageView
- android:id="@+id/ivSettings"
- android:src="@drawable/nav_setting_normal"
- android:contentDescription="@string/img_desc"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerVertical="true"
- android:layout_alignParentRight="true"
- android:layout_marginRight="10dip"/>
- </RelativeLayout>
- <ImageView
- android:src="@drawable/picture"
- android:contentDescription="@string/img_desc"
- android:scaleType="fitXY"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:layout_below="@id/titlebar"/>
- </RelativeLayout>
- <!-- 左侧菜单导航 -->
- <RelativeLayout
- android:id="@+id/leftLayout"
- android:layout_width="140dip"
- android:layout_height="match_parent"
- android:background="#000000">
- <RelativeLayout
- android:id="@+id/leftTitlebar"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:background="@color/grey21"
- android:padding="5dip">
- <TextView
- android:layout_marginLeft="5dip"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignParentLeft="true"
- android:layout_centerVertical="true"
- android:text="@string/leftNav"
- android:textSize="20sp"
- android:textColor="#ffffff"/>
- </RelativeLayout>
- <com.chris.lr.slidemenu.LayoutRelative
- android:id="@+id/layoutSlideMenu"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:layout_below="@id/leftTitlebar">
- <ListView
- android:id="@+id/listMore"
- android:cacheColorHint="#00000000"
- android:layout_width="match_parent"
- android:layout_height="match_parent"/>
- </com.chris.lr.slidemenu.LayoutRelative>
- </RelativeLayout>
- <!-- 右侧菜单导航 -->
- <RelativeLayout
- android:id="@+id/rightLayout"
- android:layout_width="140dip"
- android:layout_height="match_parent"
- android:background="#000000">
- <RelativeLayout
- android:id="@+id/rightTitlebar"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:background="@color/gold"
- android:padding="5dip">
- <TextView
- android:layout_marginLeft="5dip"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignParentLeft="true"
- android:layout_centerVertical="true"
- android:text="@string/right_title"
- android:textSize="20sp"
- android:textColor="#ffffff"/>
- </RelativeLayout>
- <TextView
- android:text="@string/rightNav"
- android:textColor="#ff00ff"
- android:textSize="18sp"
- android:layout_width="match_parent"
- android:layout_height="30dip"
- android:layout_below="@id/rightTitlebar"
- android:background="#000000"/>
- </RelativeLayout>
- </RelativeLayout>
布局很简单,我个人比较推荐用RelativeLayout,因为这个是几个Layout中,性能最好的,而LinearLayout则不好,原因在于,某个子视图的宽高变动,会引起这个布局中其它地方也需要重新调整。
布局中,有com.chris.lr.slidemenu.LayoutRelative这个自定义控件是继承RelativeLayout的,里面只是加了些手势的处理,它的作用实际上就是最开始讲到的,如果含有ListView这类需要判断手势的,则就用到它,先由它来判断,然后在视情况是否拦截由自己来处理。
二、自定义控件:
- package com.chris.lr.slidemenu;
- import android.content.Context;
- import android.util.AttributeSet;
- import android.util.Log;
- import android.view.GestureDetector;
- import android.view.GestureDetector.SimpleOnGestureListener;
- import android.view.MotionEvent;
- import android.widget.RelativeLayout;
- public class LayoutRelative extends RelativeLayout {
- private static final String TAG = "ChrisSlideMenu";
- private GestureDetector mGestureDetector;
- private boolean bLockScrollX = false;
- private boolean bTouchIntercept = false;
- private OnScrollListener mOnScrollListenerCallback = null;
- public LayoutRelative(Context context) {
- this(context, null);
- }
- public LayoutRelative(Context context, AttributeSet attrs) {
- this(context, attrs, 0);
- }
- public LayoutRelative(Context context, AttributeSet attrs, int defStyle) {
- super(context, attrs, defStyle);
- mGestureDetector = new GestureDetector(new LayoutGestureListener());
- }
- /**
- * 设置滚动监听接口
- * @param l
- */
- public void setOnScrollListener(OnScrollListener l){
- mOnScrollListenerCallback = l;
- }
- /*
- * Progress:
- * 1. 重载dispatchTouchEvent,将消息传递给GestureDetector;
- * 2. 重载手势中onDown 和 onScroll两个函数;
- * 3. 在onDown中,默认对水平滚动方向加锁;
- * 4. 在onScroll中,判断e1与e2的水平方向与垂直方向距离:
- * a. 如果垂直方向大,则表明是上下滚动,且返回false表明当前手势不用拦截;
- * b. 如果水平方向大,则表明是左右滚动,且返回true表明当前手势需要拦截;
- * 5. 重载onInterceptTouchEvent,如果手势返回为true,则onInterceptTouchEvent也返回true;
- * 6. 如果要拦截手势消息,则需要重载onTouchEvent,或子视图中重载这个函数,来处理这条消息;
- * 7. 如果自己处理,则对水平方向滚动去锁(表明当前用户想左右滚动);
- *
- * ----------
- * ---------------------- ------>| onDown |
- * | | | ----------
- * | dispatchTouchEvent | <---- ------ false: 上下滚动
- * | | | ------------ /
- * ---------------------- ------>| onScroll | ----
- * | ------------ \
- * | ------ true : 左右滚动
- * | intercept = true ----------------
- * |----------------------| onTouchEvent |
- * | ----------------
- * -------------------------
- * | |
- * | onInterceptTouchEvent |
- * | |
- * -------------------------
- *
- */
- @Override
- public boolean dispatchTouchEvent(MotionEvent ev) {
- bTouchIntercept = mGestureDetector.onTouchEvent(ev);
- if(MotionEvent.ACTION_UP == ev.getAction() && !bLockScrollX){
- if(mOnScrollListenerCallback != null){
- mOnScrollListenerCallback.doOnRelease();
- }
- }
- return super.dispatchTouchEvent(ev);
- }
- // viewgroup.onInterceptTouchEvent
- @Override
- public boolean onInterceptTouchEvent(MotionEvent ev) {
- super.onInterceptTouchEvent(ev);
- return bTouchIntercept;
- }
- // view.onTouchEvent
- @Override
- public boolean onTouchEvent(MotionEvent event) {
- bLockScrollX = false;
- return super.onTouchEvent(event);
- }
- /**
- * @author cheng.yang
- *
- * 自定义手势监听
- */
- public class LayoutGestureListener extends SimpleOnGestureListener {
- @Override
- public boolean onDown(MotionEvent e) {
- bLockScrollX = true;
- return super.onDown(e);
- }
- @Override
- public boolean onScroll(MotionEvent e1, MotionEvent e2,
- float distanceX, float distanceY) {
- if(!bLockScrollX){
- if(mOnScrollListenerCallback != null){
- mOnScrollListenerCallback.doOnScroll(e1, e2, distanceX, distanceY);
- }
- }
- if(Math.abs(e1.getY() - e2.getY()) > Math.abs(e1.getX() - e2.getX())){
- return false;
- }else{
- return true;
- }
- }
- }
- public interface OnScrollListener {
- void doOnScroll(MotionEvent e1, MotionEvent e2,
- float distanceX, float distanceY);
- void doOnRelease();
- }
- }
这个控件中,含有一个接口,当用户手势为左右时,则需要将滚动数据回传到主视图中去处理,而自己拦截不往下传递消息。里面有个消息流程图,讲的比较详细了,大家可以先看看,有什么问题,可以问我。
三、MainActivity的实现:
这个需要着讲解,毕竟,左、右滑动的实现都在这里。
- /**
- *
- * @author cheng.yang
- *
- * 左、右菜单滑出
- *
- * params[0]: 滑动距离
- * params[1]: 滑动速度,带方向
- */
- public class SlideMenu extends AsyncTask<Integer, Integer, Void>{
- @Override
- protected Void doInBackground(Integer... params) {
- if(params.length != 2){
- Log.e(TAG, "error, params must have 2!");
- }
- int times = params[0] / Math.abs(params[1]);
- if(params[0] % Math.abs(params[1]) != 0){
- times ++;
- }
- for(int i = 0; i < times; i++){
- this.publishProgress(params[0], params[1], i+1);
- }
- return null;
- }
- @Override
- protected void onProgressUpdate(Integer... values) {
- if(values.length != 3){
- Log.e(TAG, "error, values must have 3!");
- }
- int distance = Math.abs(values[1]) * values[2];
- int delta = values[0] - distance;
- int leftMargin = 0;
- if(values[1] < 0){ // 左移
- leftMargin = (delta > 0 ? values[1] : -(Math.abs(values[1]) - Math.abs(delta)));
- }else{
- leftMargin = (delta > 0 ? values[1] : (Math.abs(values[1]) - Math.abs(delta)));
- }
- rollLayout(leftMargin);
- }
首先,自定义一个继承于AsyncTask的类的线程,这个自定义类,就是用来实现动画效果,重在“滑动”,而不是硬生生的挤出来。关于AsyncTask的用法,大家可以看我的博客中关于它的讲解:
自定义类的使用需要两个参数,一个是滑动的距离,一个是每次滑动多少且向哪个方向滑动:
1. 滑动距离:若是左侧菜单滑出来,距离就是左侧菜单的宽度;同理,右侧滑出就是右侧菜单的宽度;
2. 滑动速度:即动画滑动时,向哪个方向,且每次滑动多少像素;
在doInBackground中,计算需要滑动多少次,然后用for循环调用publishProgress,实际上就是调用的onProgressUpdate,在onProgressUpdate中,根据方向,以及当前main layout的 leftMargin来计算是滑动指定的距离(速度),还是当终点距离小于滑动速度时,速度就为终点距离,最终,调用rollLayout,来修改 leftLayout, mainLayout, rightLayout三者的布局,达到滑动的效果。
rollLayout的实现:
- private void rollLayout(int margin){
- RelativeLayout.LayoutParams lp = (LayoutParams) mainLayout.getLayoutParams();
- lp.leftMargin += margin;
- lp.rightMargin -= margin;
- mainLayout.setLayoutParams(lp);
- lp = (LayoutParams) leftLayout.getLayoutParams();
- lp.leftMargin += margin;
- leftLayout.setLayoutParams(lp);
- lp = (LayoutParams) rightLayout.getLayoutParams();
- lp.leftMargin += margin;
- lp.rightMargin -= margin;
- rightLayout.setLayoutParams(lp);
- }
这个就是修改三个layout的leftMargin和rightMargin。
初始化布局控件:
- private void initView(){
- mainLayout = (RelativeLayout) findViewById(R.id.mainLayout);
- leftLayout = (RelativeLayout) findViewById(R.id.leftLayout);
- rightLayout = (RelativeLayout) findViewById(R.id.rightLayout);
- mainLayout.setOnTouchListener(this);
- leftLayout.setOnTouchListener(this);
- rightLayout.setOnTouchListener(this);
- layoutSlideMenu = (LayoutRelative) findViewById(R.id.layoutSlideMenu);
- layoutSlideMenu.setOnScrollListener(new OnScrollListener(){
- @Override
- public void doOnScroll(MotionEvent e1, MotionEvent e2,
- float distanceX, float distanceY) {
- onScroll(distanceX);
- }
- @Override
- public void doOnRelease(){
- onRelease();
- }
- });
- ivMore = (ImageView) findViewById(R.id.ivMore);
- ivSettings = (ImageView) findViewById(R.id.ivSettings);
- ivMore.setOnTouchListener(this);
- ivSettings.setOnTouchListener(this);
- mListMore = (ListView) findViewById(R.id.listMore);
- mListMore.setAdapter(new ArrayAdapter<String>(this, R.layout.item, R.id.tv_item, title));
- mListMore.setOnItemClickListener(this);
- mGestureDetector = new GestureDetector(this);
- mGestureDetector.setIsLongpressEnabled(false);
- resizeLayout();
- }
调整三个layout,将leftLayout移动到屏幕最左边之外,现时将rightLayout移动到屏幕最右边之外:
- /*
- * 使用leftMargin及rightMargin防止layout被挤压变形
- * Math.abs(leftMargin - rightMargin) = layout.width
- */
- private void resizeLayout(){
- DisplayMetrics dm = getResources().getDisplayMetrics();
- // 固定 main layout, 防止被左、右挤压变形
- RelativeLayout.LayoutParams lp = (LayoutParams) mainLayout.getLayoutParams();
- lp.width = dm.widthPixels;
- mainLayout.setLayoutParams(lp);
- // 将左layout调整至main layout左边
- lp = (LayoutParams) leftLayout.getLayoutParams();
- lp.leftMargin = -lp.width;
- leftLayout.setLayoutParams(lp);
- Log.d(TAG, "left l.margin = " + lp.leftMargin);
- // 将左layout调整至main layout右边
- lp = (LayoutParams) rightLayout.getLayoutParams();
- lp.leftMargin = dm.widthPixels;
- lp.rightMargin = -lp.width;
- rightLayout.setLayoutParams(lp);
- Log.d(TAG, "right l.margin = " + lp.leftMargin);
- }
重载onTouch,处理消息:
- // onTouch ///
- @Override
- public boolean onTouch(View v, MotionEvent event) {
- mClickedView = v;
- if(MotionEvent.ACTION_UP == event.getAction() && bIsScrolling){
- onRelease();
- }
- return mGestureDetector.onTouchEvent(event);
- }
记录选择的view,并将消息传给GestureDetector;
重载GestureDetector的onDown, onScroll, onSingleTapUp这三个是主要的,其它的重载不做任何修改;- /// GestureDetector Override Begin ///
- @Override
- public boolean onDown(MotionEvent e) {
- bIsScrolling = false;
- mScroll = 0;
- iLimited = 0;
- RelativeLayout.LayoutParams lp = (LayoutParams) mainLayout.getLayoutParams();
- if(lp.leftMargin > 0){
- iLimited = 1;
- }else if(lp.leftMargin < 0){
- iLimited = -1;
- }
- return true;
- }
在onDown中,判断当前的 mainLayout 的 leftMargin 的值,并用 iLimited 记录下来,原因:
如果当前显示的是左侧菜单,则用户滚动屏幕时,最多只是将左侧菜单滑出到屏幕外,而不会继续滑动,将右侧菜单显示出来;同理,当前已经显示了右侧菜单。
- @Override
- public boolean onSingleTapUp(MotionEvent e) {
- /*
- * 正常情况下,mainLayout的leftMargin为0,
- * 当左/右菜单为打开中,此时就不为0,需要判断
- */
- if(mClickedView != null){
- RelativeLayout.LayoutParams lp = (LayoutParams) mainLayout.getLayoutParams();
- if(mClickedView == ivMore){
- Log.d(TAG, "[onSingleTapUp] ivMore clicked! leftMargin = " + lp.leftMargin);
- if(lp.leftMargin == 0){
- new SlideMenu().execute(leftLayout.getLayoutParams().width, SPEED);
- }else{
- new SlideMenu().execute(leftLayout.getLayoutParams().width, -SPEED);
- }
- }else if(mClickedView == ivSettings){
- Log.d(TAG, "[onSingleTapUp] ivSettings clicked! leftMargin = " + lp.leftMargin);
- if(lp.leftMargin == 0){
- new SlideMenu().execute(rightLayout.getLayoutParams().width, -SPEED);
- }else{
- new SlideMenu().execute(rightLayout.getLayoutParams().width, SPEED);
- }
- }else if(mClickedView == mainLayout){
- Log.d(TAG, "[onSingleTapUp] mainLayout clicked!");
- }
- }
- return true;
- }
这个函数中,处理标题栏左、右两个按钮,点击一次,显示侧导航菜单,再点击一次,则关闭。
- @Override
- public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
- float distanceY) {
- onScroll(distanceX);
- return false;
- }
滚动处理,直接将本次的水平滚动距离传给onScroll函数来处理,因为,侧边导航菜单的水平滚动也将通过OnScrollListener.doOnScroll来回调,所以,写个通用函数。
- private void onScroll(float distanceX){
- bIsScrolling = true;
- mScroll += distanceX; // 向左为正
- Log.d(TAG, "mScroll = " + mScroll + ", distanceX = " + distanceX);
- RelativeLayout.LayoutParams lp = (LayoutParams) mainLayout.getLayoutParams();
- RelativeLayout.LayoutParams lpLeft = (LayoutParams) leftLayout.getLayoutParams();
- RelativeLayout.LayoutParams lpRight = (LayoutParams) rightLayout.getLayoutParams();
- Log.d(TAG, "lp.leftMargin = " + lp.leftMargin);
- int distance = 0;
- if(mScroll > 0){ // 向左移动
- if(lp.leftMargin <= 0){ // 打开右导航菜单
- if(iLimited > 0){
- return;
- }
- distance = lpRight.width - Math.abs(lp.leftMargin);
- }else if(lp.leftMargin > 0){ // 关闭左导航菜单
- distance = lp.leftMargin;
- }
- if(mScroll >= distance){
- mScroll = distance;
- }
- }else if(mScroll < 0){ // 向右移动
- if(lp.leftMargin >= 0){ // 打开左导航菜单
- if(iLimited < 0){
- return;
- }
- distance = lpLeft.width - Math.abs(lp.leftMargin);
- }else if(lp.leftMargin < 0){ // 关闭右导航菜单
- distance = Math.abs(lp.leftMargin);
- }
- if(mScroll <= -distance){
- mScroll = -distance;
- }
- }
- Log.d(TAG, "mScroll = " + mScroll);
- if(mScroll != 0){
- rollLayout(-mScroll);
- }
- }
接下来,我们看看当侧边导航菜单,水平滚动且用户松开手指时,回调OnScrollListener.doOnRelease,我们会调用一个onRelease来负责处理收尾工作:
- private void onRelease(){
- RelativeLayout.LayoutParams lp = (LayoutParams) mainLayout.getLayoutParams();
- if(lp.leftMargin < 0){ // 左移
- /*
- * 左移大于右导航宽度一半,则自动展开,否则自动缩回去
- */
- if(Math.abs(lp.leftMargin) > rightLayout.getLayoutParams().width/2){
- new SlideMenu().execute(rightLayout.getLayoutParams().width - Math.abs(lp.leftMargin), -SPEED);
- }else{
- new SlideMenu().execute(Math.abs(lp.leftMargin), SPEED);
- }
- }else if(lp.leftMargin > 0){
- /*
- * 右移大于左导航宽度一半,则自动展开,否则自动缩回去
- */
- if(Math.abs(lp.leftMargin) > leftLayout.getLayoutParams().width/2){
- new SlideMenu().execute(leftLayout.getLayoutParams().width - Math.abs(lp.leftMargin), SPEED);
- }else{
- new SlideMenu().execute(Math.abs(lp.leftMargin), -SPEED);
- }
- }
- }
主要的代码块已经讲解完了,下面是完整的代码:
- package com.chris.lr.slidemenu;
- import com.chris.lr.slidemenu.LayoutRelative.OnScrollListener;
- import android.os.AsyncTask;
- import android.os.Bundle;
- import android.util.DisplayMetrics;
- import android.util.Log;
- import android.view.GestureDetector;
- import android.view.GestureDetector.OnGestureListener;
- import android.view.KeyEvent;
- import android.view.MotionEvent;
- import android.view.View;
- import android.view.View.OnTouchListener;
- import android.view.Window;
- import android.widget.AdapterView;
- import android.widget.AdapterView.OnItemClickListener;
- import android.widget.ArrayAdapter;
- import android.widget.ImageView;
- import android.widget.ListView;
- import android.widget.RelativeLayout;
- import android.widget.Toast;
- import android.widget.RelativeLayout.LayoutParams;
- import android.app.Activity;
- public class MainActivity extends Activity implements OnGestureListener,
- OnTouchListener, OnItemClickListener {
- private static final String TAG = "ChrisSlideMenu";
- private RelativeLayout mainLayout;
- private RelativeLayout leftLayout;
- private RelativeLayout rightLayout;
- private LayoutRelative layoutSlideMenu;
- private ListView mListMore;
- private ImageView ivMore;
- private ImageView ivSettings;
- private GestureDetector mGestureDetector;
- private static final int SPEED = 30;
- private boolean bIsScrolling = false;
- private int iLimited = 0;
- private int mScroll = 0;
- private View mClickedView = null;
- private String title[] = { "待发送队列",
- "同步分享设置",
- "编辑我的资料",
- "找朋友",
- "告诉朋友",
- "节省流量",
- "推送设置",
- "版本更新",
- "意见反馈",
- "积分兑换",
- "精品应用",
- "常见问题",
- "退出当前帐号",
- "退出1",
- "退出2",
- "退出3",
- "退出4"};
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- this.requestWindowFeature(Window.FEATURE_NO_TITLE);
- setContentView(R.layout.activity_main);
- initView();
- }
- private void initView(){
- mainLayout = (RelativeLayout) findViewById(R.id.mainLayout);
- leftLayout = (RelativeLayout) findViewById(R.id.leftLayout);
- rightLayout = (RelativeLayout) findViewById(R.id.rightLayout);
- mainLayout.setOnTouchListener(this);
- leftLayout.setOnTouchListener(this);
- rightLayout.setOnTouchListener(this);
- layoutSlideMenu = (LayoutRelative) findViewById(R.id.layoutSlideMenu);
- layoutSlideMenu.setOnScrollListener(new OnScrollListener(){
- @Override
- public void doOnScroll(MotionEvent e1, MotionEvent e2,
- float distanceX, float distanceY) {
- onScroll(distanceX);
- }
- @Override
- public void doOnRelease(){
- onRelease();
- }
- });
- ivMore = (ImageView) findViewById(R.id.ivMore);
- ivSettings = (ImageView) findViewById(R.id.ivSettings);
- ivMore.setOnTouchListener(this);
- ivSettings.setOnTouchListener(this);
- mListMore = (ListView) findViewById(R.id.listMore);
- mListMore.setAdapter(new ArrayAdapter<String>(
- this, R.layout.item, R.id.tv_item, title));
- mListMore.setOnItemClickListener(this);
- mGestureDetector = new GestureDetector(this);
- mGestureDetector.setIsLongpressEnabled(false);
- resizeLayout();
- }
- /*
- * 使用leftMargin及rightMargin防止layout被挤压变形
- * Math.abs(leftMargin - rightMargin) = layout.width
- */
- private void resizeLayout(){
- DisplayMetrics dm = getResources().getDisplayMetrics();
- // 固定 main layout, 防止被左、右挤压变形
- RelativeLayout.LayoutParams lp =
- (LayoutParams) mainLayout.getLayoutParams();
- lp.width = dm.widthPixels;
- mainLayout.setLayoutParams(lp);
- // 将左layout调整至main layout左边
- lp = (LayoutParams) leftLayout.getLayoutParams();
- lp.leftMargin = -lp.width;
- leftLayout.setLayoutParams(lp);
- Log.d(TAG, "left l.margin = " + lp.leftMargin);
- // 将左layout调整至main layout右边
- lp = (LayoutParams) rightLayout.getLayoutParams();
- lp.leftMargin = dm.widthPixels;
- lp.rightMargin = -lp.width;
- rightLayout.setLayoutParams(lp);
- Log.d(TAG, "right l.margin = " + lp.leftMargin);
- }
- @Override
- public boolean onKeyDown(int keyCode, KeyEvent event) {
- if(keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0){
- RelativeLayout.LayoutParams lp =
- (LayoutParams) mainLayout.getLayoutParams();
- if(lp.leftMargin != 0){
- if(lp.leftMargin > 0){
- new SlideMenu().execute(
- leftLayout.getLayoutParams().width, -SPEED);
- }else if(lp.leftMargin < 0){
- new SlideMenu().execute(
- rightLayout.getLayoutParams().width, SPEED);
- }
- return true;
- }
- }
- return super.onKeyDown(keyCode, event);
- }
- private void rollLayout(int margin){
- RelativeLayout.LayoutParams lp =
- (LayoutParams) mainLayout.getLayoutParams();
- lp.leftMargin += margin;
- lp.rightMargin -= margin;
- mainLayout.setLayoutParams(lp);
- lp = (LayoutParams) leftLayout.getLayoutParams();
- lp.leftMargin += margin;
- leftLayout.setLayoutParams(lp);
- lp = (LayoutParams) rightLayout.getLayoutParams();
- lp.leftMargin += margin;
- lp.rightMargin -= margin;
- rightLayout.setLayoutParams(lp);
- }
- private void onScroll(float distanceX){
- bIsScrolling = true;
- mScroll += distanceX; // 向左为正
- Log.d(TAG, "mScroll = " + mScroll + ", distanceX = " + distanceX);
- RelativeLayout.LayoutParams lp =
- (LayoutParams) mainLayout.getLayoutParams();
- RelativeLayout.LayoutParams lpLeft =
- (LayoutParams) leftLayout.getLayoutParams();
- RelativeLayout.LayoutParams lpRight =
- (LayoutParams) rightLayout.getLayoutParams();
- Log.d(TAG, "lp.leftMargin = " + lp.leftMargin);
- int distance = 0;
- if(mScroll > 0){ // 向左移动
- if(lp.leftMargin <= 0){ // 打开右导航菜单
- if(iLimited > 0){
- return;
- }
- distance = lpRight.width - Math.abs(lp.leftMargin);
- }else if(lp.leftMargin > 0){ // 关闭左导航菜单
- distance = lp.leftMargin;
- }
- if(mScroll >= distance){
- mScroll = distance;
- }
- }else if(mScroll < 0){ // 向右移动
- if(lp.leftMargin >= 0){ // 打开左导航菜单
- if(iLimited < 0){
- return;
- }
- distance = lpLeft.width - Math.abs(lp.leftMargin);
- }else if(lp.leftMargin < 0){ // 关闭右导航菜单
- distance = Math.abs(lp.leftMargin);
- }
- if(mScroll <= -distance){
- mScroll = -distance;
- }
- }
- Log.d(TAG, "mScroll = " + mScroll);
- if(mScroll != 0){
- rollLayout(-mScroll);
- }
- }
- private void onRelease(){
- RelativeLayout.LayoutParams lp =
- (LayoutParams) mainLayout.getLayoutParams();
- if(lp.leftMargin < 0){ // 左移
- /*
- * 左移大于右导航宽度一半,则自动展开,否则自动缩回去
- */
- if(Math.abs(lp.leftMargin) > rightLayout.getLayoutParams().width/2){
- new SlideMenu().execute(rightLayout.getLayoutParams().width -
- Math.abs(lp.leftMargin), -SPEED);
- }else{
- new SlideMenu().execute(Math.abs(lp.leftMargin), SPEED);
- }
- }else if(lp.leftMargin > 0){
- /*
- * 右移大于左导航宽度一半,则自动展开,否则自动缩回去
- */
- if(Math.abs(lp.leftMargin) > leftLayout.getLayoutParams().width/2){
- new SlideMenu().execute(leftLayout.getLayoutParams().width -
- Math.abs(lp.leftMargin), SPEED);
- }else{
- new SlideMenu().execute(Math.abs(lp.leftMargin), -SPEED);
- }
- }
- }
- / ListView.onItemClick ///
- @Override
- public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
- Toast.makeText(this, title[arg2], Toast.LENGTH_SHORT).show();
- }
- // onTouch ///
- @Override
- public boolean onTouch(View v, MotionEvent event) {
- mClickedView = v;
- if(MotionEvent.ACTION_UP == event.getAction() && bIsScrolling){
- onRelease();
- }
- return mGestureDetector.onTouchEvent(event);
- }
- /// GestureDetector Override Begin ///
- @Override
- public boolean onDown(MotionEvent e) {
- bIsScrolling = false;
- mScroll = 0;
- iLimited = 0;
- RelativeLayout.LayoutParams lp =
- (LayoutParams) mainLayout.getLayoutParams();
- if(lp.leftMargin > 0){
- iLimited = 1;
- }else if(lp.leftMargin < 0){
- iLimited = -1;
- }
- return true;
- }
- @Override
- public boolean onFling(MotionEvent arg0, MotionEvent arg1, float arg2,
- float arg3) {
- return false;
- }
- @Override
- public void onLongPress(MotionEvent e) {
- }
- @Override
- public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
- float distanceY) {
- onScroll(distanceX);
- return false;
- }
- @Override
- public void onShowPress(MotionEvent arg0) {
- }
- @Override
- public boolean onSingleTapUp(MotionEvent e) {
- /*
- * 正常情况下,mainLayout的leftMargin为0,
- * 当左/右菜单为打开中,此时就不为0,需要判断
- */
- if(mClickedView != null){
- RelativeLayout.LayoutParams lp =
- (LayoutParams) mainLayout.getLayoutParams();
- if(mClickedView == ivMore){
- Log.d(TAG, "[onSingleTapUp] ivMore clicked! leftMargin = "
- + lp.leftMargin);
- if(lp.leftMargin == 0){
- new SlideMenu().execute(
- leftLayout.getLayoutParams().width, SPEED);
- }else{
- new SlideMenu().execute(
- leftLayout.getLayoutParams().width, -SPEED);
- }
- }else if(mClickedView == ivSettings){
- Log.d(TAG, "[onSingleTapUp] ivSettings clicked! leftMargin = "
- + lp.leftMargin);
- if(lp.leftMargin == 0){
- new SlideMenu().execute(
- rightLayout.getLayoutParams().width, -SPEED);
- }else{
- new SlideMenu().execute(
- rightLayout.getLayoutParams().width, SPEED);
- }
- }else if(mClickedView == mainLayout){
- Log.d(TAG, "[onSingleTapUp] mainLayout clicked!");
- }
- }
- return true;
- }
- /// GestureDetector Override End ///
- /**
- *
- * @author cheng.yang
- *
- * 左、右菜单滑出
- *
- * params[0]: 滑动距离
- * params[1]: 滑动速度,带方向
- */
- public class SlideMenu extends AsyncTask<Integer, Integer, Void>{
- @Override
- protected Void doInBackground(Integer... params) {
- if(params.length != 2){
- Log.e(TAG, "error, params must have 2!");
- }
- int times = params[0] / Math.abs(params[1]);
- if(params[0] % Math.abs(params[1]) != 0){
- times ++;
- }
- for(int i = 0; i < times; i++){
- this.publishProgress(params[0], params[1], i+1);
- }
- return null;
- }
- @Override
- protected void onProgressUpdate(Integer... values) {
- if(values.length != 3){
- Log.e(TAG, "error, values must have 3!");
- }
- int distance = Math.abs(values[1]) * values[2];
- int delta = values[0] - distance;
- int leftMargin = 0;
- if(values[1] < 0){ // 左移
- leftMargin = (delta > 0 ? values[1] :
- -(Math.abs(values[1]) - Math.abs(delta)));
- }else{
- leftMargin = (delta > 0 ? values[1] :
- (Math.abs(values[1]) - Math.abs(delta)));
- }
- rollLayout(leftMargin);
- }
- }
- }
总结: 本文左,右滑出菜单的原理,就是用到了leftMargin和rightMargin两个属性,并配合几个GestureDetector来完全手势判断的逻辑处理,其中,自定义的那个控件布局LayoutRelative,可以用在任何子视图中需要处理上下,左右滚动冲突的地方,良好的解决了冲突问题。
完整的代码下载地址:
希望大家多来聊聊,同时,大家可以在我的基础上,实现onFling的方法,欢迎交流。
转载地址:https://blog.csdn.net/thinkinwm/article/details/9326855 如侵犯您的版权,请留言回复原文章的地址,我们会给您删除此文章,给您带来不便请您谅解!