private Bitmap getScreenImage() { // 截取一张屏幕的图片
    View view = root;
    view.setBackgroundColor(Color.WHITE);
    view.setDrawingCacheEnabled(true);
    view.buildDrawingCache();
    Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache(), 0, 0, view.getWidth(), view
        .getHeight());
    view.destroyDrawingCache();
    return bitmap;
  }

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
  android:id="@+id/activity_main"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context="com.fndroid.threedtouchdemo.MainActivity">

  <LinearLayout
    android:id="@+id/root"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.v7.widget.Toolbar
      android:id="@+id/toolbar"
      android:layout_width="match_parent"
      android:layout_height="?attr/actionBarSize"
      android:background="@color/colorPrimary"
      app:title="@string/app_name"
      app:titleTextColor="#fff"/>

    <ListView
      android:id="@+id/lv"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      tools:listitem="@layout/item"/>
  </LinearLayout>

  <ImageView
    android:id="@+id/cover"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

  <android.support.v7.widget.CardView
    android:id="@+id/cv"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:translationZ="5dp"
    app:cardCornerRadius="10dp"/>

</FrameLayout>

  private Bitmap blur(Bitmap bitmap, float radius) {
    Bitmap output = Bitmap.createBitmap(bitmap); // 创建输出图片
    RenderScript rs = RenderScript.create(this); // 构建一个RenderScript对象
    ScriptIntrinsicBlur gaussianBlue = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); //
    // 创建高斯模糊脚本
    Allocation allIn = Allocation.createFromBitmap(rs, bitmap); // 开辟输入内存
    Allocation allOut = Allocation.createFromBitmap(rs, output); // 开辟输出内存
    gaussianBlue.setRadius(radius); // 设置模糊半径，范围0f<radius<=25f
    gaussianBlue.setInput(allIn); // 设置输入内存
    gaussianBlue.forEach(allOut); // 模糊编码，并将内存填入输出内存
    allOut.copyTo(output); // 将输出内存编码为Bitmap，图片大小必须注意
    rs.destroy(); // 关闭RenderScript对象，API>=23则使用rs.releaseAllContexts()
    return output;
  }

  defaultConfig {
    ...
    renderscriptTargetApi 18
    renderscriptSupportModeEnabled true
  }

  // 显示对应的卡片
  private void showView(int position, View view){
    newView = LayoutInflater.from(this).inflate(R.layout.item, null); // 加载Itme的布局
    TextView tv = (TextView) newView.findViewById(R.id.item_tv); // 获取对应控件
    tv.setText(data.get(position).get("name")); // 将Item对应控件的值设置回去
    newView.setBackgroundColor(Color.WHITE);
    // 设置卡片的样式，位置通过margintop来计算
    FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(view.getWidth() - 30, view.getHeight());
    params.topMargin = (int) (view.getY() + mToolbar.getHeight()); // 卡片的marginTop设置为item的Y加上toolbar的高度
    params.leftMargin = 15;
    params.rightMargin = 15;
    mCardView.setVisibility(View.VISIBLE);
    mCardView.setLayoutParams(params);
    mCardView.addView(newView, view.getLayoutParams()); // 把View加载进CardView，并设置样式为item样式
    startAnimate(mCardView); // 播放动画
  }

  private void startAnimate(CardView cardView) {
    PropertyValuesHolder pyhScaleX = PropertyValuesHolder.ofFloat("scaleX", 0.1f, 1.05f);
    PropertyValuesHolder pyhScaleY = PropertyValuesHolder.ofFloat("scaleY", 0.1f, 1.05f);
    ObjectAnimator animator_out = ObjectAnimator.ofPropertyValuesHolder(mCardView, pyhScaleX,
        pyhScaleY); // 同时缩放X和Y
    animator_out.setInterpolator(new AccelerateDecelerateInterpolator());
    animator_out.setDuration(350);
    PropertyValuesHolder pyhScaleX2 = PropertyValuesHolder.ofFloat("scaleX", 1.05f, 1f);
    PropertyValuesHolder pyhScaleY2 = PropertyValuesHolder.ofFloat("scaleY", 1.05f, 1f);
    ObjectAnimator animator_in = ObjectAnimator.ofPropertyValuesHolder(mCardView, pyhScaleX2,
        pyhScaleY2);
    animator_in.setInterpolator(new AccelerateDecelerateInterpolator());
    animator_in.setDuration(100);

    AnimatorSet animatorSet = new AnimatorSet();
    animatorSet.playSequentially(animator_out, animator_in); // 按顺序执行两个动画
    animatorSet.start();
  }

@Override
  public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
    mCover.setImageBitmap(blur(blur(getScreenImage(), 25f),25f)); // 对截取的图片两次高斯模糊
    mCover.setVisibility(View.VISIBLE);
    mCover.setImageAlpha(0);
    new Thread(new Runnable() {
      int progress = 50;

      @Override
      public void run() {
        while (progress < 255) {
          try {
            Thread.sleep(1);
          } catch (InterruptedException e) {
            e.printStackTrace();
          }
          Message msg = new Message();
          msg.obj = progress++;
          mHandler.sendMessage(msg);
        }
      }
    }).start();
    showView(position, view);
    return true;
  }

  private Bitmap getSmallSizeBitmap(Bitmap source, float percent) {
    if (percent > 1 || percent <= 0) {
      throw new IllegalArgumentException("percent must be > 1 and <= 0");
    }
    Matrix matrix = new Matrix();
    matrix.setScale(percent, percent);
    return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true);
  }