zhuan zi :http://blog.csdn.net/jj120522/article/details/8075249
2012-10-24 12:0922313人阅读评论(151)收藏举报
首先我们看下面视图:
这种效果大家都不陌生,网上好多都说是仿人人网的,估计人家牛逼出来的早吧,我也参考了一一些例子,实现起来有三种方法,我下面简单介绍下:
方法一:其实就是对GestureDetector手势的应用及布局文件的设计.
布局文件main.xml 采用RelativeLayout布局.
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical" >
- <LinearLayout
- android:id="@+id/layout_right"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:layout_marginLeft="50dp"
- android:orientation="vertical" >
- <AbsoluteLayout
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:background="@color/grey21"
- android:padding="10dp" >
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="设置"
- android:textColor="@android:color/background_light"
- android:textSize="20sp" />
- </AbsoluteLayout>
- <ListView
- android:id="@+id/lv_set"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:layout_weight="1" >
- </ListView>
- </LinearLayout>
- <LinearLayout
- android:id="@+id/layout_left"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:background="@color/white"
- android:orientation="vertical" >
- <RelativeLayout
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:background="@drawable/nav_bg" >
- <ImageView
- android:id="@+id/iv_set"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignParentRight="true"
- android:layout_alignParentTop="true"
- android:src="@drawable/nav_setting" />
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerInParent="true"
- android:text="我"
- android:textColor="@android:color/background_light"
- android:textSize="20sp" />
- </RelativeLayout>
- <ImageView
- android:id="@+id/iv_set"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:scaleType="fitXY"
- android:src="@drawable/bg_guide_5" />
- </LinearLayout>
- </RelativeLayout>
layout_right:这个大布局文件,layout_left:距离左边50dp像素.(我们要移动的是layout_left).
看到这个图我想大家都很清晰了吧,其实:我们就是把layout_left这个布局控件整理向左移动,至于移动多少,就要看layout_right有多宽了。layout_left移动到距离左边的边距就是layout_right的宽及-MAX_WIDTH.相信大家都理解.
布局文件就介绍到这里,下面看代码.
- /***
- * 初始化view
- */
- void InitView() {
- layout_left = (LinearLayout) findViewById(R.id.layout_left);
- layout_right = (LinearLayout) findViewById(R.id.layout_right);
- iv_set = (ImageView) findViewById(R.id.iv_set);
- lv_set = (ListView) findViewById(R.id.lv_set);
- lv_set.setAdapter(new ArrayAdapter<String>(this, R.layout.item,
- R.id.tv_item, title));
- lv_set.setOnItemClickListener(new OnItemClickListener() {
- @Override
- public void onItemClick(AdapterView<?> parent, View view,
- int position,
long id) { - Toast.makeText(MainActivity.this, title[position],
1).show(); - }
- });
- layout_left.setOnTouchListener(this);
- iv_set.setOnTouchListener(this);
- mGestureDetector = new GestureDetector(this);
- // 禁用长按监听
- mGestureDetector.setIsLongpressEnabled(false);
- getMAX_WIDTH();
- }
这里要对手势进行监听,我想大家都知道怎么做,在这里我要说明一个方法:
- /***
- * 获取移动距离 移动的距离其实就是layout_left的宽度
- */
- void getMAX_WIDTH() {
- ViewTreeObserver viewTreeObserver = layout_left.getViewTreeObserver();
- // 获取控件宽度
- viewTreeObserver.addOnPreDrawListener(new OnPreDrawListener() {
- @Override
- public
boolean onPreDraw() { - if (!hasMeasured) {
- window_width = getWindowManager().getDefaultDisplay()
- .getWidth();
- RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left
- .getLayoutParams();
- layoutParams.width = window_width;
- layout_left.setLayoutParams(layoutParams);
- MAX_WIDTH = layout_right.getWidth();
- Log.v(TAG, "MAX_WIDTH=" + MAX_WIDTH +
"width=" - + window_width);
- hasMeasured = true;
- }
- return true;
- }
- });
- }
在这里我们要获取屏幕的宽度,并将屏幕宽度设置给layout_left这个控件,为什么要这么做呢,因为如果不把该控件宽度写死的话,那么系统将认为layout_left会根据不同环境宽度自动适应,也就是说我们通过layout_left.getLayoutParams动态移动该控件的时候,该控件会伸缩而不是移动。描述的有点模糊,大家请看下面示意图就明白了.
我们不为layout_left定义死宽度效果:
getLayoutParams可以很清楚看到,layout_left被向左拉伸了,并不是我们要的效果.
还有一种解决办法就是我们在配置文件中直接把layout_left宽度写死,不过这样不利于开发,因为分辨率的问题.因此就用ViewTreeObserver进行对layout_left设置宽度.
ViewTreeObserver,这个类主要用于对布局文件的监听.强烈建议同学们参考这篇文章
android ViewTreeObserver详细讲解,相信让你对ViewTreeObserver有更一步的了解.
其他的就是对GestureDetector手势的应用,下面我把代码贴出来:
- package com.jj.slidingmenu;
- import android.app.Activity;
- import android.os.AsyncTask;
- import android.os.Bundle;
- import android.util.Log;
- import android.view.GestureDetector;
- import android.view.KeyEvent;
- import android.view.MotionEvent;
- import android.view.View;
- import android.view.ViewTreeObserver;
- import android.view.ViewTreeObserver.OnPreDrawListener;
- import android.view.Window;
- import android.view.View.OnTouchListener;
- import android.widget.AdapterView;
- import android.widget.AdapterView.OnItemClickListener;
- import android.widget.ArrayAdapter;
- import android.widget.ImageView;
- import android.widget.LinearLayout;
- import android.widget.ListView;
- import android.widget.RelativeLayout;
- import android.widget.Toast;
- import android.widget.LinearLayout.LayoutParams;
- /***
- * 滑动菜单
- *
- * @author jjhappyforever...
- *
- */
- public class MainActivity
extends Activity implements OnTouchListener,
- GestureDetector.OnGestureListener {
- private boolean hasMeasured =
false;// 是否Measured.
- private LinearLayout layout_left;
- private LinearLayout layout_right;
- private ImageView iv_set;
- private ListView lv_set;
- /** 每次自动展开/收缩的范围 */
- private int MAX_WIDTH =
0; - /** 每次自动展开/收缩的速度 */
- private final
static int SPEED =
30; - private GestureDetector mGestureDetector;// 手势
- private boolean isScrolling =
false; - private float mScrollX;
// 滑块滑动距离 - private int window_width;// 屏幕的宽度
- private String TAG =
"jj"; - 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" };
- /***
- * 初始化view
- */
- void InitView() {
- layout_left = (LinearLayout) findViewById(R.id.layout_left);
- layout_right = (LinearLayout) findViewById(R.id.layout_right);
- iv_set = (ImageView) findViewById(R.id.iv_set);
- lv_set = (ListView) findViewById(R.id.lv_set);
- lv_set.setAdapter(new ArrayAdapter<String>(this, R.layout.item,
- R.id.tv_item, title));
- lv_set.setOnItemClickListener(new OnItemClickListener() {
- @Override
- public
void onItemClick(AdapterView<?> parent, View view,
- int position,
long id) { - Toast.makeText(MainActivity.this, title[position],
1).show(); - }
- });
- layout_left.setOnTouchListener(this);
- iv_set.setOnTouchListener(this);
- mGestureDetector = new GestureDetector(this);
- // 禁用长按监听
- mGestureDetector.setIsLongpressEnabled(false);
- getMAX_WIDTH();
- }
- /***
- * 获取移动距离 移动的距离其实就是layout_left的宽度
- */
- void getMAX_WIDTH() {
- ViewTreeObserver viewTreeObserver = layout_left.getViewTreeObserver();
- // 获取控件宽度
- viewTreeObserver.addOnPreDrawListener(new OnPreDrawListener() {
- @Override
- public boolean onPreDraw() {
- if (!hasMeasured) {
- window_width = getWindowManager().getDefaultDisplay()
- .getWidth();
- RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left
- .getLayoutParams();
- // layoutParams.width = window_width;
- layout_left.setLayoutParams(layoutParams);
- MAX_WIDTH = layout_right.getWidth();
- Log.v(TAG, "MAX_WIDTH=" + MAX_WIDTH +
"width=" - + window_width);
- hasMeasured = true;
- }
- return
true; - }
- });
- }
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- requestWindowFeature(Window.FEATURE_NO_TITLE);
- setContentView(R.layout.main);
- InitView();
- }
- // 返回键
- @Override
- public boolean onKeyDown(int keyCode, KeyEvent event) {
- if (KeyEvent.KEYCODE_BACK == keyCode && event.getRepeatCount() ==
0) { - RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left
- .getLayoutParams();
- if (layoutParams.leftMargin <
0) { - new AsynMove().execute(SPEED);
- return false;
- }
- }
- return super.onKeyDown(keyCode, event);
- }
- @Override
- public boolean onTouch(View v, MotionEvent event) {
- // 松开的时候要判断,如果不到半屏幕位子则缩回去,
- if (MotionEvent.ACTION_UP == event.getAction() && isScrolling ==
true) { - RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left
- .getLayoutParams();
- // 缩回去
- if (layoutParams.leftMargin < -window_width /
2) { - new AsynMove().execute(-SPEED);
- } else {
- new AsynMove().execute(SPEED);
- }
- }
- return mGestureDetector.onTouchEvent(event);
- }
- @Override
- public boolean onDown(MotionEvent e) {
- mScrollX = 0;
- isScrolling = false;
- // 将之改为true,不然事件不会向下传递.
- return true;
- }
- @Override
- public void onShowPress(MotionEvent e) {
- }
- /***
- * 点击松开执行
- */
- @Override
- public boolean onSingleTapUp(MotionEvent e) {
- RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left
- .getLayoutParams();
- // 左移动
- if (layoutParams.leftMargin >=
0) { - new AsynMove().execute(-SPEED);
- } else {
- // 右移动
- new AsynMove().execute(SPEED);
- }
- return true;
- }
- /***
- * e1 是起点,e2是终点,如果distanceX=e1.x-e2.x>0说明向左滑动。反之亦如此.
- */
- @Override
- public boolean onScroll(MotionEvent e1, MotionEvent e2,
float distanceX, - float distanceY) {
- isScrolling = true;
- mScrollX += distanceX;// distanceX:向左为正,右为负
- RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left
- .getLayoutParams();
- layoutParams.leftMargin -= mScrollX;
- if (layoutParams.leftMargin >=
0) { - isScrolling = false;// 拖过头了不需要再执行AsynMove了
- layoutParams.leftMargin = 0;
- } else if (layoutParams.leftMargin <= -MAX_WIDTH) {
- // 拖过头了不需要再执行AsynMove了
- isScrolling = false;
- layoutParams.leftMargin = -MAX_WIDTH;
- }
- layout_left.setLayoutParams(layoutParams);
- return false;
- }
- @Override
- public void onLongPress(MotionEvent e) {
- }
- @Override
- public boolean onFling(MotionEvent e1, MotionEvent e2,
float velocityX, - float velocityY) {
- return false;
- }
- class AsynMove extends AsyncTask<Integer, Integer, Void> {
- @Override
- protected Void doInBackground(Integer... params) {
- int times = 0;
- if (MAX_WIDTH % Math.abs(params[0]) ==
0)// 整除
- times = MAX_WIDTH / Math.abs(params[0]);
- else
- times = MAX_WIDTH / Math.abs(params[0]) +
1;// 有余数
- for (int i =
0; i < times; i++) { - publishProgress(params[0]);
- try {
- Thread.sleep(Math.abs(params[0]));
- } catch (InterruptedException e) {
- e.printStackTrace();
- }
- }
- return
null; - }
- /**
- * update UI
- */
- @Override
- protected void onProgressUpdate(Integer... values) {
- RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left
- .getLayoutParams();
- // 右移动
- if (values[0] >
0) { - layoutParams.leftMargin = Math.min(layoutParams.leftMargin
- + values[0],
0); - Log.v(TAG, "移动右" + layoutParams.rightMargin);
- } else {
- // 左移动
- layoutParams.leftMargin = Math.max(layoutParams.leftMargin
- + values[0], -MAX_WIDTH);
- Log.v(TAG, "移动左" + layoutParams.rightMargin);
- }
- layout_left.setLayoutParams(layoutParams);
- }
- }
- }
上面代码注释已经很明确,相信大家都看的明白,我就不过多解释了。
效果图:截屏出来有点卡,不过在手机虚拟机上是不卡的.
怎么样,看着还行吧,我们在看下面一个示例:
简单说明一下,当你滑动的时候左边会跟着右边一起滑动,这个效果比上面那个酷吧,上面那个有点死板,其实实现起来也比较容易,只需要把我们上面那个稍微修改下,对layout_right也进行时时更新,这样就实现了这个效果了,如果上面那个理解了,这个很轻松就解决了,在这里我又遇到一个问题:此时的listview的item监听不到手势,意思就是我左右滑动listview他没有进行滑动。
本人对touch众多事件监听拦截等熟悉度不够,因此这里我用到自己写的方法,也许比较麻烦,如果有更好的解决办法,请大家一定要分享哦,再次 thanks for you 了.
具体解决办法:我们重写listview,对此listview进行手势监听,我们自定义一个接口来实现,具体代码如下:
- package com.jj.slidingmenu;
- import android.content.Context;
- import android.util.AttributeSet;
- import android.util.Log;
- import android.view.GestureDetector;
- import android.view.MotionEvent;
- import android.view.GestureDetector.OnGestureListener;
- import android.view.View;
- import android.widget.ListView;
- import android.widget.Toast;
- public class MyListView
extends ListView implements OnGestureListener {
- private GestureDetector gd;
- // 事件状态
- public static
final char