Java Code Examples for android.support.v7.widget.RecyclerView#getLocationOnScreen()

/**
 * @param recyclerView
 * @param view
 * @return
 */
public static boolean isChildInCenterX(@NonNull RecyclerView recyclerView, @NonNull View view) {
    int childCount = recyclerView.getChildCount();
    int[] lvLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(lvLocationOnScreen);
    int middleX = lvLocationOnScreen[0] + recyclerView.getWidth() / 2;
    if (childCount > 0) {
        int[] vLocationOnScreen = new int[2];
        view.getLocationOnScreen(vLocationOnScreen);
        int width = view.getWidth();
        if (vLocationOnScreen[0] <= middleX && vLocationOnScreen[0] + width >= middleX) {
            return true;
        }
    }
    return false;
}
 

/**
 * @param recyclerView
 * @param view
 * @return
 */
public static boolean isChildInCenterX(@NonNull RecyclerView recyclerView, @NonNull View view) {
    int childCount = recyclerView.getChildCount();
    int[] lvLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(lvLocationOnScreen);
    int middleX = lvLocationOnScreen[0] + recyclerView.getWidth() / 2;
    if (childCount > 0) {
        int[] vLocationOnScreen = new int[2];
        view.getLocationOnScreen(vLocationOnScreen);
        int width = view.getWidth();
        if (vLocationOnScreen[0] <= middleX && vLocationOnScreen[0] + width >= middleX) {
            return true;
        }
    }
    return false;
}
 

/**
     * 获取当前点击的位置在RecyclerView内部的坐标 (Y坐标范围0+padding到height-padding)?
     */
    private float[] getInsideLocation(RecyclerView recyclerView, float touchRawX, float touchRawY) {
        float[] result = new float[2];
        int[] location = new int[2];
        recyclerView.getLocationOnScreen(location);
        result[0] = touchRawX - location[0];
        result[1] = touchRawY - location[1];
//        System.out.println("getInsideLocation:" + result[0] + "-" + result[1] + "==" + "X:" + touchRawX + "Y:" + touchRawY);

        result[0] = result[0] / dragListener.getScale();
        result[1] = result[1] / dragListener.getScale();

        int minY = recyclerView.getPaddingTop();
        int maxY = recyclerView.getHeight() - recyclerView.getPaddingBottom();
        result[1] = Math.min(Math.max(result[1], minY), maxY);


        return result;
    }
 

private ImageView addMirrorView(ViewGroup parent, RecyclerView recyclerView, View view) {
    view.destroyDrawingCache();
    view.setDrawingCacheEnabled(true);
    ImageView mirrorView = new ImageView(recyclerView.getContext());
    Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache());
    mirrorView.setImageBitmap(bitmap);
    view.setDrawingCacheEnabled(false);
    int[] locations = new int[2];
    view.getLocationOnScreen(locations);
    int[] parenLocations = new int[2];
    recyclerView.getLocationOnScreen(parenLocations);
    LayoutParams params = new LayoutParams(bitmap.getWidth(), bitmap.getHeight());
    params.setMargins(locations[0], (locations[1] - parenLocations[1]) + UIsUtils.dipToPx(44.0f), 0, 0);
    parent.addView(mirrorView, params);
    return mirrorView;
}
 

/**
 * 添加需要移动的 镜像View
 */
private ImageView addMirrorView(ViewGroup parent, RecyclerView recyclerView, View view) {
    /**
     * 我们要获取cache首先要通过setDrawingCacheEnable方法开启cache，然后再调用getDrawingCache方法就可以获得view的cache图片了。
     buildDrawingCache方法可以不用调用，因为调用getDrawingCache方法时，若果cache没有建立，系统会自动调用buildDrawingCache方法生成cache。
     若想更新cache, 必须要调用destoryDrawingCache方法把旧的cache销毁，才能建立新的。
     当调用setDrawingCacheEnabled方法设置为false, 系统也会自动把原来的cache销毁。
     */
    view.destroyDrawingCache();
    view.setDrawingCacheEnabled(true);
    final ImageView mirrorView = new ImageView(recyclerView.getContext());
    Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache());
    mirrorView.setImageBitmap(bitmap);
    view.setDrawingCacheEnabled(false);
    int[] locations = new int[2];
    view.getLocationOnScreen(locations);
    int[] parenLocations = new int[2];
    recyclerView.getLocationOnScreen(parenLocations);
    FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(bitmap.getWidth(), bitmap.getHeight());
    params.setMargins(locations[0], locations[1] - parenLocations[1], 0, 0);
    parent.addView(mirrorView, params);

    return mirrorView;
}
 

/**
 * 添加需要移动的 镜像View
 */
private ImageView addMirrorView(ViewGroup parent, RecyclerView recyclerView, View view) {
    /**
     * 我们要获取cache首先要通过setDrawingCacheEnable方法开启cache，然后再调用getDrawingCache方法就可以获得view的cache图片了。
     buildDrawingCache方法可以不用调用，因为调用getDrawingCache方法时，若果cache没有建立，系统会自动调用buildDrawingCache方法生成cache。
     若想更新cache, 必须要调用destoryDrawingCache方法把旧的cache销毁，才能建立新的。
     当调用setDrawingCacheEnabled方法设置为false, 系统也会自动把原来的cache销毁。
     */
    view.destroyDrawingCache();
    view.setDrawingCacheEnabled(true);
    final ImageView mirrorView = new ImageView(recyclerView.getContext());
    Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache());
    mirrorView.setImageBitmap(bitmap);
    view.setDrawingCacheEnabled(false);
    int[] locations = new int[2];
    view.getLocationOnScreen(locations);
    int[] parenLocations = new int[2];
    recyclerView.getLocationOnScreen(parenLocations);
    FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(bitmap.getWidth(), bitmap.getHeight());
    params.setMargins(locations[0], locations[1] - parenLocations[1], 0, 0);
    parent.addView(mirrorView, params);

    return mirrorView;
}
 

public static boolean isChildInCenterY(RecyclerView recyclerView, View view) {
    int childCount = recyclerView.getChildCount();
    int[] lvLocationOnScreen = new int[2];
    int[] vLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(lvLocationOnScreen);
    int middleY = lvLocationOnScreen[1] + recyclerView.getHeight() / 2;
    if (childCount > 0) {
        view.getLocationOnScreen(vLocationOnScreen);
        if (vLocationOnScreen[1] <= middleY && vLocationOnScreen[1] + view.getHeight() >= middleY) {
            return true;
        }
    }
    return false;
}
 

public static boolean isChildInCenterX(RecyclerView recyclerView, View view) {
    int childCount = recyclerView.getChildCount();
    int[] lvLocationOnScreen = new int[2];
    int[] vLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(lvLocationOnScreen);
    int middleX = lvLocationOnScreen[0] + recyclerView.getWidth() / 2;
    if (childCount > 0) {
        view.getLocationOnScreen(vLocationOnScreen);
        if (vLocationOnScreen[0] <= middleX && vLocationOnScreen[0] + view.getWidth() >= middleX) {
            return true;
        }
    }
    return false;
}
 

public static boolean isChildInCenterX(RecyclerView recyclerView, View view) {
    int childCount = recyclerView.getChildCount();
    int[] lvLocationOnScreen = new int[2];
    int[] vLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(lvLocationOnScreen);
    int middleX = lvLocationOnScreen[0] + recyclerView.getWidth() / 2;
    if (childCount > 0) {
        view.getLocationOnScreen(vLocationOnScreen);
        if (vLocationOnScreen[0] <= middleX && vLocationOnScreen[0] + view.getWidth() >= middleX) {
            return true;
        }
    }
    return false;
}
 

public static boolean isChildInCenterY(RecyclerView recyclerView, View view) {
    int childCount = recyclerView.getChildCount();
    int[] lvLocationOnScreen = new int[2];
    int[] vLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(lvLocationOnScreen);
    int middleY = lvLocationOnScreen[1] + recyclerView.getHeight() / 2;
    if (childCount > 0) {
        view.getLocationOnScreen(vLocationOnScreen);
        if (vLocationOnScreen[1] <= middleY && vLocationOnScreen[1] + view.getHeight() >= middleY) {
            return true;
        }
    }
    return false;
}
 

public static boolean isChildInCenterX(RecyclerView recyclerView, View view) {
    int childCount = recyclerView.getChildCount();
    int[] lvLocationOnScreen = new int[2];
    int[] vLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(lvLocationOnScreen);
    int middleX = lvLocationOnScreen[0] + recyclerView.getWidth() / 2;
    if (childCount > 0) {
        view.getLocationOnScreen(vLocationOnScreen);
        if (vLocationOnScreen[0] <= middleX && vLocationOnScreen[0] + view.getWidth() >= middleX) {
            return true;
        }
    }
    return false;
}
 

public static boolean isChildInCenterY(RecyclerView recyclerView, View view) {
    int childCount = recyclerView.getChildCount();
    int[] rvLocationOnScreen = new int[2];
    int[] vLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(rvLocationOnScreen);
    int middleY = (int) (rvLocationOnScreen[1] + recyclerView.getHeight() * recyclerView.getScaleY() / 2);
    if (childCount > 0) {
        view.getLocationOnScreen(vLocationOnScreen);
        if (vLocationOnScreen[1] <= middleY && vLocationOnScreen[1] + view.getHeight() * view.getScaleY() >= middleY) {
            return true;
        }
    }
    return false;
}
 

public static boolean isChildInCenterX(RecyclerView recyclerView, View view) {
    int childCount = recyclerView.getChildCount();
    int[] lvLocationOnScreen = new int[2];
    int[] vLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(lvLocationOnScreen);
    int middleX = (int) (lvLocationOnScreen[0] + recyclerView.getWidth() * recyclerView.getScaleX() / 2);
    if (childCount > 0) {
        view.getLocationOnScreen(vLocationOnScreen);
        if (vLocationOnScreen[0] <= middleX && vLocationOnScreen[0] + view.getWidth() * view.getScaleX() >= middleX) {
            return true;
        }
    }
    return false;
}
 

/**
 * @param recyclerView
 * @param view
 * @return
 */
public static boolean isChildInCenterY(@NonNull RecyclerView recyclerView, @NonNull View view) {
    int childCount = recyclerView.getChildCount();
    int[] lvLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(lvLocationOnScreen);
    int middleY = lvLocationOnScreen[1] + recyclerView.getHeight() / 2;
    if (childCount > 0) {
        int[] vLocationOnScreen = new int[2];
        view.getLocationOnScreen(vLocationOnScreen);
        if (vLocationOnScreen[1] <= middleY && vLocationOnScreen[1] + view.getHeight() >= middleY) {
            return true;
        }
    }
    return false;
}
 

/**
 * @param recyclerView
 * @param view
 * @return
 */
public static boolean isChildInCenterY(@NonNull RecyclerView recyclerView, @NonNull View view) {
    int childCount = recyclerView.getChildCount();
    int[] lvLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(lvLocationOnScreen);
    int middleY = lvLocationOnScreen[1] + recyclerView.getHeight() / 2;
    if (childCount > 0) {
        int[] vLocationOnScreen = new int[2];
        view.getLocationOnScreen(vLocationOnScreen);
        if (vLocationOnScreen[1] <= middleY && vLocationOnScreen[1] + view.getHeight() >= middleY) {
            return true;
        }
    }
    return false;
}
 

public static boolean isChildInCenterY(RecyclerView recyclerView, View view) {
    int childCount = recyclerView.getChildCount();
    int[] lvLocationOnScreen = new int[2];
    int[] vLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(lvLocationOnScreen);
    int middleY = lvLocationOnScreen[1] + recyclerView.getHeight() / 2;
    if (childCount > 0) {
        view.getLocationOnScreen(vLocationOnScreen);
        if (vLocationOnScreen[1] <= middleY && vLocationOnScreen[1] + view.getHeight() >= middleY) {
            return true;
        }
    }
    return false;
}
 

public static boolean isChildInCenterX(RecyclerView recyclerView, View view) {
    int childCount = recyclerView.getChildCount();
    int[] lvLocationOnScreen = new int[2];
    int[] vLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(lvLocationOnScreen);
    int middleX = lvLocationOnScreen[0] + recyclerView.getWidth() / 2;
    if (childCount > 0) {
        view.getLocationOnScreen(vLocationOnScreen);
        if (vLocationOnScreen[0] <= middleX && vLocationOnScreen[0] + view.getWidth() >= middleX) {
            return true;
        }
    }
    return false;
}
 

public static boolean isChildInCenterY(RecyclerView recyclerView, View view) {
    int childCount = recyclerView.getChildCount();
    int[] lvLocationOnScreen = new int[2];
    int[] vLocationOnScreen = new int[2];
    recyclerView.getLocationOnScreen(lvLocationOnScreen);
    int middleY = lvLocationOnScreen[1] + recyclerView.getHeight() / 2;
    if (childCount > 0) {
        view.getLocationOnScreen(vLocationOnScreen);
        if (vLocationOnScreen[1] <= middleY && vLocationOnScreen[1] + view.getHeight() >= middleY) {
            return true;
        }
    }
    return false;
}