Android自定义HorizontalScrollView实现qq侧滑菜单

<?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:background="@drawable/img_frame_background" >  <LinearLayout  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:layout_centerInParent="true"  android:orientation="vertical" >  <RelativeLayout  android:layout_width="fill_parent"  android:layout_height="wrap_content" >  <ImageView  android:id="@+id/image1"  android:layout_width="50dp"  android:layout_height="50dp"  android:layout_marginLeft="20dp"  android:src="@drawable/img_1" />  <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:layout_toRightOf="@id/image1"  android:textColor="#ffffff"  android:layout_marginLeft="20dp"  android:text="第一个Item"  android:textSize="20sp" />  </RelativeLayout>  <RelativeLayout  android:layout_width="wrap_content"  android:layout_height="wrap_content" >  <ImageView  android:id="@+id/image2"  android:layout_width="50dp"  android:layout_height="50dp"  android:layout_marginLeft="20dp"  android:src="@drawable/img_2" />  <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:layout_toRightOf="@id/image2"  android:textColor="#ffffff"  android:layout_marginLeft="20dp"  android:text="第二个Item"  android:textSize="20sp" />  </RelativeLayout>  <RelativeLayout  android:layout_width="wrap_content"  android:layout_height="wrap_content" >  <ImageView  android:id="@+id/image3"  android:layout_width="50dp"  android:layout_height="50dp"  android:layout_marginLeft="20dp"  android:src="@drawable/img_3" />  <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:layout_toRightOf="@id/image3"  android:textColor="#ffffff"  android:layout_marginLeft="20dp"  android:text="第三个Item"  android:textSize="20sp" />  </RelativeLayout>  <RelativeLayout  android:layout_width="wrap_content"  android:layout_height="wrap_content" >  <ImageView  android:id="@+id/image4"  android:layout_width="50dp"  android:layout_height="50dp"  android:layout_marginLeft="20dp"  android:src="@drawable/img_4" />  <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:layout_toRightOf="@id/image4"  android:textColor="#ffffff"  android:layout_marginLeft="20dp"  android:text="第四个Item"  android:textSize="20sp" />  </RelativeLayout> <RelativeLayout  android:layout_width="wrap_content"  android:layout_height="wrap_content" > <ImageView  android:id="@+id/image5"  android:layout_width="50dp"  android:layout_height="50dp"  android:layout_marginLeft="20dp"  android:src="@drawable/img_5" /> <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:layout_toRightOf="@id/image5"  android:textColor="#ffffff"  android:layout_marginLeft="20dp"  android:text="第五个Item"  android:textSize="20sp" />  </RelativeLayout>  </LinearLayout> </RelativeLayout> 

<?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" > <com.example.myhorizontalscrollview.MyHorizontalScrollView  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:scrollbars="none">  <LinearLayout  android:layout_width="wrap_content"  android:layout_height="fill_parent"  android:orientation="horizontal"  >  <include layout="@layout/menu" />  <LinearLayout  android:layout_width="fill_parent"  android:layout_height="fill_parent" android:background="@drawable/qq" />  </LinearLayout> </com.example.myhorizontalscrollview.MyHorizontalScrollView> </RelativeLayout> 

@Override protected void onLayout(boolean changed, int l, int t, int r, int b) {  // TODO Auto-generated method stub  super.onLayout(changed, l, t, r, b); } 

@Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {  // TODO Auto-generated method stub  super.onMeasure(widthMeasureSpec, heightMeasureSpec); } 

package com.example.myhorizontalscrollview; import android.annotation.SuppressLint; import android.content.Context; import android.text.GetChars; import android.util.AttributeSet; import android.util.DisplayMetrics; import android.util.TypedValue; import android.view.MotionEvent; import android.view.ViewGroup; import android.view.WindowManager; import android.widget.HorizontalScrollView; import android.widget.LinearLayout; public class MyHorizontalScrollView extends HorizontalScrollView {  //滚动条中的水平先行布局  private LinearLayout mWrpper;  //水平线性布局的左侧菜单menu  private ViewGroup mMenu;  //水平先行布局的右侧线性布局  private ViewGroup mContent;  //屏幕的宽  private int mScreenWidth;  //menu的宽离屏幕右侧的距离  private int mMenuRightPadding=50;  //menu的宽度  private int mMenuWidth;  private boolean once;  /**  * 未使用自定义属性时调用  * */  public MyHorizontalScrollView(Context context, AttributeSet attrs) {  super(context, attrs);  /*  * 获取屏幕的宽度  * 通过context拿到windowManager，在通过windowManager拿到Metrics,用DisplayMetrics接收  * */  WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);  DisplayMetrics outMetrics = new DisplayMetrics();  wm.getDefaultDisplay().getMetrics(outMetrics);  mScreenWidth=outMetrics.widthPixels;  //把dp转换成px  mMenuRightPadding=(int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50,  context.getResources().getDisplayMetrics());  }  /*  * 设置子view的宽和高  * */  @Override  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {  // TODO Auto-generated method stub  if(!once){  mWrpper=(LinearLayout) getChildAt(0);  mMenu=(ViewGroup) mWrpper.getChildAt(0);  mContent=(ViewGroup) mWrpper.getChildAt(1);  //menu的宽度等于屏幕的宽度减去menu离屏幕右侧的边距  mMenuWidth=mMenu.getLayoutParams().width=mScreenWidth-mMenuRightPadding;  //右边的先行布局的宽度直接等于屏幕的宽度  mContent.getLayoutParams().width=mScreenWidth;  once=true;  }  super.onMeasure(widthMeasureSpec, heightMeasureSpec);  }  /*  * 通过设置偏移量将menu隐藏  * */  @Override  protected void onLayout(boolean changed, int l, int t, int r, int b) {  // TODO Auto-generated method stub  super.onLayout(changed, l, t, r, b);  /*  * 通过scrollTo（x,y）方法设置屏幕的偏移量，x为正  * 内容向左移动  * */  if(changed){  this.scrollTo(mMenuWidth, 0);  }  }  /*  * 因为HorizontalScrollView自己控制move和down的事件  * 所以我们还要判断一下up.如果当前的x偏移量大于menu宽度的一半  * 隐藏menu，否则显示menu  * */  @Override  public boolean onTouchEvent(MotionEvent ev) {  // TODO Auto-generated method stub  int action=ev.getAction();  switch(action){  case MotionEvent.ACTION_UP:  int scrollX=getScrollX();  if(scrollX>=mMenuWidth/2){  this.smoothScrollTo(mMenuWidth, 0);  }  else{  this.smoothScrollTo(0, 0);  }  return true;  }  return super.onTouchEvent(ev);  } } 

package com.example.slipping; import com.example.helloworld.R; import android.os.Bundle; import android.app.Activity; import android.view.Menu; public class MainActivity extends Activity {  @Override  protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  } }