有没有code设置壁纸无需裁剪和放大的Andr​​oid？ [英] Is there any code to set wallpaper without cropping and zooming in android?

问题描述

我创建一个画廊的应用程序，我的第一个应用程序，这是我的code

i am creating a gallery app , my first app and this is my code

    Bitmap bmd = BitmapFactory.decodeStream(is);

    try{
        getApplicationContext().setWallpaper(bmd);
    }catch(IOException e){
        e.printStackTrace();
    }

以上code设置壁纸但墙纸被裁剪或放大它得到了设置后！ 是否有任何的修改，我可以在上面code做，这样我可以设置壁纸，而不进行缩放或当它被设置裁剪!!!!

The above code sets wallpaper But the wallpaper gets cropped or zoomed after it got set !! Is there any modification i can do in the above code so that i can set wallpaper without zooming or cropping when it is set !!!!

Plzzzz帮助我！在此先感谢： - ）

Plzzzz help me out !! Thanks in advance :-)

推荐答案

我迟到回复此。希望它可以帮助你和谁访问你的问题：

I am late to reply this. Hope it helps you and those who visits your question:

在你的情况下，尝试通过调整图片大小的设备有点像这样的：

In your case, try to adjust your picture to device size by somewhat like this:

DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int height = displayMetrics.heightPixels;
int width = displayMetrics.widthPixels << 1; // best wallpaper width is twice screen width

// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);

// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, width, height);

// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
Bitmap decodedSampleBitmap = BitmapFactory.decodeFile(path, options);

WallpaperManager wm = WallpaperManager.getInstance(this);
try {
    wm.setBitmap(decodedSampleBitmap);
} catch (IOException e) {
    Log.e(TAG, "Cannot set image as wallpaper", e);
}

如果上面的code不工作，做一个小的修改：

If above code doesn't work, do a small modification:

...
WallpaperManager wm = WallpaperManager.getInstance(this);
try {
    wm.setBitmap(decodedSampleBitmap);
    wm.suggestDesiredDimensions(width, height);
} catch (IOException e) {
    Log.e(TAG, "Cannot set image as wallpaper", e);
}

和方法 calculateInSampleSize ：

public static int calculateInSampleSize(
            BitmapFactory.Options options, int reqWidth, int reqHeight) {
    // Raw height and width of image
    final int height = options.outHeight;
    final int width = options.outWidth;
    int inSampleSize = 1;

    if (height > reqHeight || width > reqWidth) {

        final int halfHeight = height / 2;
        final int halfWidth = width / 2;

        // Calculate the largest inSampleSize value that is a power of 2 and keeps both
        // height and width larger than the requested height and width.
        while ((halfHeight / inSampleSize) > reqHeight
                && (halfWidth / inSampleSize) > reqWidth) {
            inSampleSize *= 2;
        }
    }

    return inSampleSize;
}

和记得添加权限：

<uses-permission android:name="android.permission.SET_WALLPAPER_HINTS"/>
<uses-permission android:name="android.permission.SET_WALLPAPER"/>

这篇关于有没有code设置壁纸无需裁剪和放大的Andr​​oid？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！