Android沉浸式状态栏 + actionBar渐变 + scrollView顶部伸缩效果

<style name="TranslucentTheme" parent="@style/AppTheme"></style>

<style name="TranslucentTheme" parent="@style/AppTheme"> <item name="android:windowTranslucentStatus">true</item> <item name="android:windowTranslucentNavigation">false</item></style>

<style name="TranslucentTheme" parent="@style/AppTheme"> <item name="android:windowTranslucentStatus">true</item> <item name="android:windowTranslucentNavigation">false</item> <!-- v-21 中新增的属性 --> <item name="android:statusBarColor">@android:color/transparent</item></style>

package test.com.widget; import android.content.Context; import android.text.TextUtils; import android.util.AttributeSet; import android.view.View; import android.view.ViewGroup; import android.widget.LinearLayout; import android.widget.TextView; import test.com.R; import test.com.impl.ActionBarClickListener; /**  * 支持渐变的 actionBar  * Created by 晖仔(Milo) on 2016/12/28.  * email:303767416@qq.com  */ public final class TranslucentActionBar extends LinearLayout {  private View layRoot;  private View vStatusBar;  private View layLeft;  private View layRight;  public TextView tvTitle;  private TextView tvLeft;  private TextView tvRight;  private View iconLeft;  private View iconRight;  public TranslucentActionBar(Context context) {   this(context, null);  }  public TranslucentActionBar(Context context, AttributeSet attrs) {   super(context, attrs);   init();  }  public TranslucentActionBar(Context context, AttributeSet attrs, int defStyleAttr) {   super(context, attrs, defStyleAttr);  }  private void init() {   setOrientation(HORIZONTAL);   View contentView = inflate(getContext(), R.layout.actionbar_trans, this);   layRoot = contentView.findViewById(R.id.lay_transroot);   vStatusBar = contentView.findViewById(R.id.v_statusbar);   tvTitle = (TextView) contentView.findViewById(R.id.tv_actionbar_title);   tvLeft = (TextView) contentView.findViewById(R.id.tv_actionbar_left);   tvRight = (TextView) contentView.findViewById(R.id.tv_actionbar_right);   iconLeft = contentView.findViewById(R.id.iv_actionbar_left);   iconRight = contentView.findViewById(R.id.v_actionbar_right);  }  /**   * 设置状态栏高度   *   * @param statusBarHeight   */  public void setStatusBarHeight(int statusBarHeight) {   ViewGroup.LayoutParams params = vStatusBar.getLayoutParams();   params.height = statusBarHeight;   vStatusBar.setLayoutParams(params);  }  /**   * 设置是否需要渐变   */  public void setNeedTranslucent() {   setNeedTranslucent(true, false);  }  /**   * 设置是否需要渐变,并且隐藏标题   *   * @param translucent   */  public void setNeedTranslucent(boolean translucent, boolean titleInitVisibile) {   if (translucent) {    layRoot.setBackgroundDrawable(null);   }   if (!titleInitVisibile) {    tvTitle.setVisibility(View.GONE);   }  }  /**   * 设置标题   *   * @param strTitle   */  public void setTitle(String strTitle) {   if (!TextUtils.isEmpty(strTitle)) {    tvTitle.setText(strTitle);   } else {    tvTitle.setVisibility(View.GONE);   }  }  /**   * 设置数据   *   * @param strTitle   * @param resIdLeft   * @param strLeft   * @param resIdRight   * @param strRight   * @param listener   */  public void setData(String strTitle, int resIdLeft, String strLeft, int resIdRight, String strRight, final ActionBarClickListener listener) {   if (!TextUtils.isEmpty(strTitle)) {    tvTitle.setText(strTitle);   } else {    tvTitle.setVisibility(View.GONE);   }   if (!TextUtils.isEmpty(strLeft)) {    tvLeft.setText(strLeft);    tvLeft.setVisibility(View.VISIBLE);   } else {    tvLeft.setVisibility(View.GONE);   }   if (!TextUtils.isEmpty(strRight)) {    tvRight.setText(strRight);    tvRight.setVisibility(View.VISIBLE);   } else {    tvRight.setVisibility(View.GONE);   }   if (resIdLeft == 0) {    iconLeft.setVisibility(View.GONE);   } else {    iconLeft.setBackgroundResource(resIdLeft);    iconLeft.setVisibility(View.VISIBLE);   }   if (resIdRight == 0) {    iconRight.setVisibility(View.GONE);   } else {    iconRight.setBackgroundResource(resIdRight);    iconRight.setVisibility(View.VISIBLE);   }   if (listener != null) {    layLeft = findViewById(R.id.lay_actionbar_left);    layRight = findViewById(R.id.lay_actionbar_right);    layLeft.setOnClickListener(new View.OnClickListener() {     @Override     public void onClick(View v) {      listener.onLeftClick();     }    });    layRight.setOnClickListener(new View.OnClickListener() {     @Override     public void onClick(View v) {      listener.onRightClick();     }    });   }  } } 

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:id="@+id/lay_transroot"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:background="@color/colorPrimary"  android:orientation="vertical">  <View   android:id="@+id/v_statusbar"   android:layout_width="match_parent"   android:layout_height="1.0dp" />  <RelativeLayout   android:layout_width="match_parent"   android:layout_height="45dp"   android:orientation="vertical">   <RelativeLayout    android:id="@+id/lay_actionbar_left"    android:layout_width="100dp"    android:layout_height="match_parent"    android:orientation="horizontal">    <ImageView     android:id="@+id/iv_actionbar_left"     android:layout_width="20dp"     android:layout_height="20dp"     android:layout_centerVertical="true"     android:layout_marginLeft="10dp"     android:background="@mipmap/ic_left_light"     android:visibility="gone" />    <TextView     android:id="@+id/tv_actionbar_left"     style="@style/text_white"     android:layout_height="match_parent"     android:layout_marginLeft="10dp"     android:layout_toRightOf="@+id/iv_actionbar_left"     android:gravity="center_vertical"     android:maxLength="2"     android:singleLine="true"     android:text="返回"     android:visibility="gone" />   </RelativeLayout>   <TextView    android:id="@+id/tv_actionbar_title"    style="@style/text_white"    android:layout_centerInParent="true"    android:text="标题"    android:textSize="16sp" />   <RelativeLayout    android:id="@+id/lay_actionbar_right"    android:layout_width="100dp"    android:layout_height="match_parent"    android:layout_alignParentRight="true"    android:gravity="right"    android:orientation="horizontal">    <View     android:id="@+id/v_actionbar_right"     android:layout_width="20dp"     android:layout_height="20dp"     android:layout_alignParentRight="true"     android:layout_centerVertical="true"     android:layout_marginRight="10dp"     android:visibility="gone" />    <TextView     android:id="@+id/tv_actionbar_right"     style="@style/text_white"     android:layout_height="match_parent"     android:layout_marginRight="10dp"     android:layout_toLeftOf="@+id/v_actionbar_right"     android:gravity="center_vertical|right"     android:singleLine="true"     android:visibility="gone" />   </RelativeLayout>  </RelativeLayout> </LinearLayout> 

/**  * 获取状态栏高度  *  * @return  */ public int getStatusBarHeight() {  //获取status_bar_height资源的ID  int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");  if (resourceId > 0) {   //根据资源ID获取响应的尺寸值   return getResources().getDimensionPixelSize(resourceId);  }  return 0; } 

/**  * 设置状态栏高度  *  * @param statusBarHeight  */ public void setStatusBarHeight(int statusBarHeight) {  ViewGroup.LayoutParams params = vStatusBar.getLayoutParams();  params.height = statusBarHeight;  vStatusBar.setLayoutParams(params); } 

/**  * 设置是否需要渐变  */  public void setNeedTranslucent() {   setNeedTranslucent(true, false);  }  /**  * 设置是否需要渐变,并且隐藏标题  *  * @param translucent  */  public void setNeedTranslucent(boolean translucent, boolean titleInitVisibile) {   if (translucent) {    layRoot.setBackgroundDrawable(null);   }   if (!titleInitVisibile) {    tvTitle.setVisibility(View.GONE);   }  } 

package test.com.widget;  import android.animation.ObjectAnimator; import android.animation.ValueAnimator; import android.content.Context; import android.graphics.Color; import android.support.annotation.ColorInt; import android.support.v4.graphics.ColorUtils; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.WindowManager; import android.widget.ScrollView; import test.com.R; import test.com.utils.SizeUtils; /**  * Created by 晖仔(Milo) on 2017/2/13.  * email:303767416@qq.com  */ public class TranslucentScrollView extends ScrollView {  static final String TAG = "TranslucentScrollView";  //伸缩视图  private View zoomView;  //伸缩视图初始高度  private int zoomViewInitHeight = 0;  // 记录首次按下位置  private float mFirstPosition = 0;  // 是否正在放大  private Boolean mScaling = false;  //渐变的视图  private View transView;  //渐变颜色  private int transColor = Color.WHITE;  //渐变开始位置  private int transStartY = 50;  //渐变结束位置  private int transEndY = 300;  //渐变开始默认位置，Y轴，50dp  private final int DFT_TRANSSTARTY = 50;  //渐变结束默认位置，Y轴，300dp  private final int DFT_TRANSENDY = 300;  private TranslucentScrollView.TranslucentChangedListener translucentChangedListener;  public interface TranslucentChangedListener {   /**    * 透明度变化，取值范围0-255    *    * @param transAlpha    */   void onTranslucentChanged(int transAlpha);  }  public TranslucentScrollView(Context context) {   super(context);  }  public TranslucentScrollView(Context context, AttributeSet attrs) {   super(context, attrs);  }  public TranslucentScrollView(Context context, AttributeSet attrs, int defStyleAttr) {   super(context, attrs, defStyleAttr);  }  public void setTranslucentChangedListener(TranslucentScrollView.TranslucentChangedListener translucentChangedListener) {   this.translucentChangedListener = translucentChangedListener;  }  /**   * 设置伸缩视图   *   * @param zoomView   */  public void setPullZoomView(View zoomView) {   this.zoomView = zoomView;   zoomViewInitHeight = zoomView.getLayoutParams().height;   if (zoomViewInitHeight == LayoutParams.MATCH_PARENT || zoomViewInitHeight == WindowManager.LayoutParams.WRAP_CONTENT) {    zoomView.post(new Runnable() {     @Override     public void run() {      zoomViewInitHeight = TranslucentScrollView.this.zoomView.getHeight();     }    });   }  }  /**   * 设置渐变视图   *   * @param transView 渐变的视图   */  public void setTransView(View transView) {   setTransView(transView, getResources().getColor(R.color.colorPrimary), SizeUtils.dip2px(getContext(), DFT_TRANSSTARTY), SizeUtils.dip2px(getContext(), DFT_TRANSENDY));  }  /**   * 设置渐变视图   *   * @param transView 渐变的视图   * @param transColor 渐变颜色   * @param transEndY 渐变结束位置   */  public void setTransView(View transView, @ColorInt int transColor, int transStartY, int transEndY) {   this.transView = transView;   //初始视图-透明   this.transView.setBackgroundColor(ColorUtils.setAlphaComponent(transColor, 0));   this.transStartY = transStartY;   this.transEndY = transEndY;   this.transColor = transColor;   if (transStartY > transEndY) {    throw new IllegalArgumentException("transStartY 不得大于 transEndY .. ");   }  }  /**   * 获取透明度   *   * @return   */  private int getTransAlpha() {   float scrollY = getScrollY();   if (transStartY != 0) {    if (scrollY <= transStartY) {     return 0;    } else if (scrollY >= transEndY) {     return 255;    } else {     return (int) ((scrollY - transStartY) / (transEndY - transStartY) * 255);    }   } else {    if (scrollY >= transEndY) {     return 255;    }    return (int) ((transEndY - scrollY) / transEndY * 255);   }  }  /**   * 重置ZoomView   */  private void resetZoomView() {   final ViewGroup.LayoutParams lp = zoomView.getLayoutParams();   final float h = zoomView.getLayoutParams().height;// ZoomView当前高度   // 设置动画   ValueAnimator anim = ObjectAnimator.ofFloat(0.0F, 1.0F).setDuration(200);   anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {    @Override    public void onAnimationUpdate(ValueAnimator animation) {     float cVal = (Float) animation.getAnimatedValue();     lp.height = (int) (h - (h - zoomViewInitHeight) * cVal);     zoomView.setLayoutParams(lp);    }   });   anim.start();  }  @Override  protected void onScrollChanged(int l, int t, int oldl, int oldt) {   super.onScrollChanged(l, t, oldl, oldt);   int transAlpha = getTransAlpha();   if (transView != null) {    Log.d(TAG, "[onScrollChanged .. in ], 透明度 == " + transAlpha);    transView.setBackgroundColor(ColorUtils.setAlphaComponent(transColor, transAlpha));   }   if (translucentChangedListener != null) {    translucentChangedListener.onTranslucentChanged(transAlpha);   }  }  @Override  public boolean onTouchEvent(MotionEvent event) {   if (zoomView != null) {    ViewGroup.LayoutParams params = zoomView.getLayoutParams();    switch (event.getAction()) {     case MotionEvent.ACTION_UP:      //手指离开后恢复图片      mScaling = false;      resetZoomView();      break;     case MotionEvent.ACTION_MOVE:      if (!mScaling) {       if (getScrollY() == 0) {        mFirstPosition = event.getY();       } else {        break;       }      }      int distance = (int) ((event.getY() - mFirstPosition) * 0.6);      if (distance < 0) {       break;      }      mScaling = true;      params.height = zoomViewInitHeight + distance;      Log.d(TAG, "params.height == " + params.height + ", zoomViewInitHeight == " + zoomViewInitHeight + ", distance == " + distance);      zoomView.setLayoutParams(params);      return true;    }   }   return super.onTouchEvent(event);  } }