Android自定义View 仿QQ侧滑菜单的实现代码

<fierce_luk.com.sideslipviewdemo2.SideslipView    android:id="@+id/my_veiw"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:scrollbars="none"    luk:leftPanding="200dp">    <!--如果菜单在左边直接用 LinearLayout-->    <FrameLayout      android:layout_width="match_parent"      android:layout_height="match_parent"      android:orientation="horizontal">      <TextView        android:id="@+id/image2"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:background="@mipmap/homepage"        android:gravity="center"        android:tag="0"        android:text="菜单"        android:textColor="@color/colorAccent"        android:textSize="60sp" />      <TextView        android:id="@+id/image1"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:background="@color/color1"        android:gravity="center"        android:tag="1"        android:text="主页面"        android:textColor="@color/colorAccent"        android:textSize="60sp" />    </FrameLayout>    <!--<fragment-->    <!--android:name="com.luk.bluetoothapp.fragment.MyBluetoothDevice"-->    <!--android:layout_width="match_parent"-->    <!--android:layout_height="match_parent"-->    <!--android:tag="1" />-->    <!--<fragment-->    <!--android:name="com.luk.bluetoothapp.fragment.HomeFragment"-->    <!--android:layout_width="match_parent"-->    <!--android:layout_height="match_parent"-->    <!--android:tag="0" />-->  </fierce_luk.com.sideslipviewdemo2.SideslipView>

public class SideslipView extends HorizontalScrollView {  private int mScreenWidth;//屏幕宽度  private int mMenuLeftPadding;  private int mBluetoothWidth;//菜单的宽度  private int mHalfMenuWidth;  View home;  View bluetooth;  protected boolean isOpen;  protected boolean isFirst = true;  public SideslipView(Context context) {    // super 改 this    this(context, null);  }  public SideslipView(Context context, AttributeSet attrs) {    // super 改 this    this(context, attrs, 0);  }  public SideslipView(Context context, AttributeSet attrs, int defStyleAttr) {    super(context, attrs, defStyleAttr);    //测量屏幕宽度    WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);    DisplayMetrics metrics = new DisplayMetrics();    wm.getDefaultDisplay().getMetrics(metrics);    mScreenWidth = metrics.widthPixels;    // mScreenWidth = context.getResources().getDisplayMetrics().widthPixels;    Log.e("TAG", "MyScrollView: mScreenWidth" + mScreenWidth);    //获取 自定义的属性值    TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MyScrollView);    int n = a.length();    for (int i = 0; i < n; i++) {      int arrt = a.getIndex(i);      switch (arrt) {        case R.styleable.MyScrollView_leftPanding:          mMenuLeftPadding = (int) a.getDimension(R.styleable.MyScrollView_leftPanding, 0);          break;        default:          break;      }    }    Log.e("TAG", "MyScrollView: mMenuLeftPadding" + mMenuLeftPadding);    a.recycle();  }  @Override  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {    if (isFirst) {      //获取子布局 并设置宽度      //如果菜单在左边 用LinearLayout就行//      LinearLayout layout = (LinearLayout) this.getChildAt(0);      /**此处因为 把侧边拉出页面设置在了右边 所有用 FrameLayout       * 不然在设置偏移量时 隐藏的侧边菜单会跑到主页面的上面*/      FrameLayout layout = (FrameLayout) this.getChildAt(0);      home = layout.getChildAt(1);      bluetooth = layout.getChildAt(0);      LayoutParams params = new LayoutParams(mBluetoothWidth,          getResources().getDisplayMetrics().heightPixels);      params.setMargins(mScreenWidth, 0, 0, 0);      bluetooth.setLayoutParams(params);      mBluetoothWidth = mScreenWidth - mMenuLeftPadding;      home.getLayoutParams().width = mScreenWidth;      bluetooth.getLayoutParams().width = mBluetoothWidth;      mHalfMenuWidth = mBluetoothWidth / 2;      isFirst = false;    }    super.onMeasure(widthMeasureSpec, heightMeasureSpec);  }  @Override  protected void onLayout(boolean changed, int l, int t, int r, int b) {    super.onLayout(changed, l, t, r, b);    //首先隐藏 Bluetooth    if (changed)      this.scrollTo(0, mBluetoothWidth);  }  Animation anim;  @Override  public boolean onTouchEvent(MotionEvent ev) {    switch (ev.getAction()) {      case MotionEvent.ACTION_UP:        int scrollX = getScrollX();        if (scrollX >= mHalfMenuWidth) {          Log.e("TAG", "====");          this.smoothScrollTo(mBluetoothWidth, 0);          isOpen = true;        } else {          this.smoothScrollTo(0, 0);          isOpen = false;        }        //必须消耗事件        return true;    }    return super.onTouchEvent(ev);    //return true;  }  /**   * 打开菜单栏   */  protected void openMenu() {    if (isOpen)      return;    this.smoothScrollTo(mBluetoothWidth, 0);    isOpen = true;  }  /**   * 关闭菜单栏   */  protected void closeMenu() {    if (!isOpen)      return;    this.smoothScrollTo(0, 0);    isOpen = false;  }  /**   * 按钮切换菜单   */  public void toggleMenu() {    if (isOpen)      closeMenu();    else      openMenu();  }  @Override  protected void onScrollChanged(int l, int t, int oldl, int oldt) {    super.onScrollChanged(l, t, oldl, oldt);//此处 l 起始值为零（没有偏移）    Log.e("TAG", "l=" + l + " t=" + t);    Log.e("TAG", "oldl=" + oldl + " oldt=" + oldt);    // scale 在 1 到 0 之间    float scale = l * 1.0f / mBluetoothWidth;    /**     * 抽屉式侧滑     * scaleLeft 从默认偏移量到偏移量 为零     *实现     * */    float scaleLeft = 0.4f - 0.4f * scale;    /**设置 X 轴方向的偏移量**/    ViewHelper.setTranslationX(bluetooth, -(mBluetoothWidth * scaleLeft));    Log.e("TAG", "mBluetoothWidth+" + mBluetoothWidth);    Log.e("TAG", "=============" + mBluetoothWidth * scale + "scale" + scale);/*    *//**设置缩放时的 轴心点**//*    //此处轴心为右边界的中点    ViewHelper.setPivotY(home, mScreenWidth);    ViewHelper.setPivotX(home, home.getHeight() / 2);    *//**设置 ＸＹ轴方向的 缩放动画(从 1 到 0.9)**//*    float pivoXY = 1 - 0.4f * scale;    ViewHelper.setScaleX(home, pivoXY);    ViewHelper.setScaleY(home, pivoXY);*//*    *//**设置透明度**//*    //从 1 到 0.6；    float alpha = 1 - 0.4f * scale;    ViewHelper.setAlpha(home, alpha);*/  }}

<resources>  <declare-styleable name="MyScrollView">    <attr name="rightPanding" format="dimension" />    <attr name="leftPanding" format="dimension" />  </declare-styleable></resources>

 <fierce_luk.com.sideslipviewdemo2.SideslipView    android:id="@+id/my_veiw"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:scrollbars="none"    luk:leftPanding="200dp">