WallpaperService壁纸实现

最新推荐文章于 2024-10-25 16:04:07 发布

原创最新推荐文章于 2024-10-25 16:04:07 发布 · 4.3k 阅读

CC 4.0 BY-SA版权

本文介绍了如何在Android中使用WallpaperService创建动态壁纸。步骤包括创建继承自WallpaperService的LiveWallpaperService，然后在Service中创建一个Engine的子类，并在onCreateEngine方法中返回Engine实例。此外，别忘了在AndroidManifest.xml中添加Service声明。通过这个教程，你可以了解到设置和清除壁纸所需的权限，以及动态壁纸的实现细节。

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1.使用Bitmap作为壁纸

WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);

try {       
 Bitmap wallpaperBitmap = BitmapFactory.decodeResource(getResources(), R.raw.girl);        
 wallpaperManager.setBitmap(wallpaperBitmap);    
} catch (IOException e) {        
e.printStackTrace();    
}

使用静态资源设置壁纸

WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);    
try {        
wallpaperManager.setResource(R.raw.wallpaper);    
} catch (IOException e) {        
e.printStackTrace();   
 }

清除壁纸

WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);    
try {       
 wallpaperManager.clear();    
} catch (IOException e) {       
 e.printStackTrace();   
 }

设置壁纸需要添加权限

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

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

动态壁纸

1.首先创建一个壁纸Service（LiveWallpaperService），继承WallpaperService
2.在LiveWallpaperService中创建一个引擎（LiveWallpaperEngine），继承LiveWallpaperService.Engine
3.在LiveWallpaperService的onCreateEngine方法中，返回LiveWallpaperEngine的实例
4.在AndroidManifest添加Service

public class CameraLiveWallpaper extends WallpaperService {
    @Override
    public Engine onCreateEngine() {
        return new CameraEngine();
    }


    class CameraEngine extends Engine implements Camera.PreviewCallback {
        private Camera camera;

        @Override
        public void onCreate(SurfaceHolder surfaceHolder) {
            super.onCreate(surfaceHolder);

            startPreview();
            // 设置处理触摸事件
            setTouchEventsEnabled(true);

        }

        @Override
        public void onTouchEvent(MotionEvent event) {
            super.onTouchEvent(event);
            // 时间处理:点击拍照,长按拍照
        }

        @Override
        public void onDestroy() {
            super.onDestroy();
            stopPreview();
        }

        @Override
        public void onVisibilityChanged(boolean visible) {
            if (visible) {
                startPreview();
            } else {
                stopPreview();
            }
        }

        /**
         * 开始预览
         */
        public void startPreview() {
            camera = Camera.open();
            camera.setDisplayOrientation(90);

            try {
                camera.setPreviewDisplay(getSurfaceHolder());
            } catch (IOException e) {
                e.printStackTrace();
            }
            camera.startPreview();

        }

        /**
         * 停止预览
         */
        public void stopPreview() {
            if (camera != null) {
                try {
                    camera.stopPreview();
                    camera.setPreviewCallback(null);
                    // camera.lock();
                    camera.release();
                } catch (Exception e) {
                    e.printStackTrace();
                }
                camera = null;
            }
        }

        @Override
        public void onPreviewFrame(byte[] bytes, Camera camera) {
            camera.addCallbackBuffer(bytes);
        }
    }
}

<service
    android:name=".test.CameraLiveWallpaper"
    android:label="@string/app_name"
    android:permission="android.permission.BIND_WALLPAPER">

    <intent-filter>
        <action android:name="android.service.wallpaper.WallpaperService" />
    </intent-filter>
    <meta-data
        android:name="android.service.wallpaper"
        android:resource="@xml/livewallpaper" />
</service>

res/xml

<?xml version="1.0" encoding="utf-8"?>
<wallpaper xmlns:android="http://schemas.android.com/apk/res/android"
    android:thumbnail="@mipmap/ic_launcher" />