壁纸不适合设备屏幕

Question

我在一个可绘制文件夹中有一组图像。我有一个按钮可以将图像设置为设备屏幕上的墙纸。但是当我将此图像设置为墙纸时，它要么缩放要么裁剪。我希望图像应该适合屏幕尺寸。我在 SO 上看到了很多链接，但没有一个链接对我有用。这是我目前正在尝试的代码。

代码-

Bitmap bmap2 = BitmapFactory.decodeStream(getResources().openRawResource(mThumb[position]));
DisplayMetrics metrics = new DisplayMetrics(); 
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int height = metrics.heightPixels; 
int width = metrics.widthPixels;
Bitmap bitmap = Bitmap.createScaledBitmap(bmap2, width, height, true); 
WallpaperManager wallpaperManager = WallpaperManager.getInstance(this); 
try {
  wallpaperManager.setBitmap(bitmap);
  } catch (IOException e) {
  e.printStackTrace();
}

我还在清单中添加了以下几行-

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

Answer 1

您好，这是我检查过的可绘制图像..

                DisplayMetrics metrics = new DisplayMetrics(); 
                getWindowManager().getDefaultDisplay().getMetrics(metrics);
                int height = metrics.heightPixels; 
                int width = metrics.widthPixels;
                Bitmap tempbitMap = BitmapFactory.decodeResource(getResources(), R.drawable.img);
                Bitmap bitmap = Bitmap.createScaledBitmap(tempbitMap,width,height, true);
                WallpaperManager wallpaperManager = WallpaperManager.getInstance(MainActivity.this); 
                wallpaperManager.setWallpaperOffsetSteps(1, 1);
                wallpaperManager.suggestDesiredDimensions(width, height);
                try {
                  wallpaperManager.setBitmap(bitmap);
                  } catch (IOException e) {
                  e.printStackTrace();
                }

还要在 Manifest.xml 中提及这些权限..

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

这是截图..

要重置屏幕的适合壁纸，请将图像路径存储在共享首选项中并使用 Boot Completed Receiver 然后重置屏幕上的相同壁纸....

广播接收器是..

import java.io.IOException;

import android.app.WallpaperManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.WindowManager;

public class BootReceiver extends BroadcastReceiver {
private static final String TAG="BootReceiver";

@Override public void onReceive(Context context,Intent intent){
    try{
            DisplayMetrics metrics = new DisplayMetrics(); 
            WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
            windowManager.getDefaultDisplay().getMetrics(metrics);
            int height = metrics.heightPixels; 
            int width = metrics.widthPixels;
            Bitmap tempbitMap = BitmapFactory.decodeResource(context.getResources(), R.drawable.img);
            Bitmap bitmap = Bitmap.createScaledBitmap(tempbitMap,width,height, true);
            WallpaperManager wallpaperManager = WallpaperManager.getInstance(context); 
            wallpaperManager.setWallpaperOffsetSteps(1, 1);
            wallpaperManager.suggestDesiredDimensions(width, height);
            try {
              wallpaperManager.setBitmap(bitmap);
              } catch (IOException e) {
              e.printStackTrace();
            }
    }catch(Exception e){
        Log.e(TAG,e.toString());
    }
}
}

在 Manifest.xml 中添加这些行之后

       <receiver
            android:name=".BootReceiver"
            android:enabled="true"
            android:exported="true"
            android:label="BootReceiver" >
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" >
                </action>
            </intent-filter>
        </receiver>

Answer 2

试试这个代码

Bitmap bmap2 =BitmapFactory.decodeStream(getResources().openRawResource(mThumb[position]));
    DisplayMetrics metrics = new DisplayMetrics(); 
    getWindowManager().getDefaultDisplay().getMetrics(metrics);
    int height = metrics.heightPixels; 
    int width = metrics.widthPixels;
    Bitmap bitmap = Bitmap.createScaledBitmap(bmap2, width, height, true); 
    WallpaperManager wallpaperManager = WallpaperManager.getInstance(this); 
    wallpaperManager.setWallpaperOffsetSteps(1, 1);
    wallpaperManager.suggestDesiredDimensions(width, height);
    try {
      wallpaperManager.setBitmap(bitmap);
      } catch (IOException e) {
      e.printStackTrace();
    }

Answer 3

如果您有图片网址，请使用：

WallpaperManager wpm = WallpaperManager.getInstance(context);
InputStream ins = new URL("absolute/path/of/image").openStream();
wpm.setStream(ins);

如果您有图像 URI，则使用

WallpaperManager wpm = WallpaperManager.getInstance(context);
wpm.setResource(Uri.of.image);

在您的清单文件中：

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

别忘了将此代码放在AsyncTask。

Answer 4

试试这个代码：

public void changeWallpaper(String path) {
        FileInputStream is;
        BufferedInputStream bis;
        WallpaperManager wallpaperManager;
        Drawable wallpaperDrawable;
        File sdcard = Environment.getExternalStorageDirectory();
        try {
            is = new FileInputStream(new File(path));
            bis = new BufferedInputStream(is);
            Bitmap bitmap = BitmapFactory.decodeStream(bis);
            Bitmap useThisBitmap = Bitmap.createBitmap(bitmap);
            wallpaperManager = WallpaperManager.getInstance(getActivity());
            wallpaperDrawable = wallpaperManager.getDrawable();
            wallpaperManager.setBitmap(useThisBitmap);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

在这个例子中，我使用了来自我的device SD 卡片的图片...

这对我来说非常有用..

Answer 5

注意：可能不适合你。

你需要这个：

WallpaperManager wallpaperManager = WallpaperManager.getInstance(this); 
             try {
              wallpaperManager.setBitmap(bitmap);

              wallpaperManager.suggestDesiredDimensions(width, height);
                Toast.makeText(this, "Wallpaper Set", Toast.LENGTH_SHORT).show();
             } catch (IOException e) {
              e.printStackTrace();
             }

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