Java 将活动中的图像传递给android类（实时壁纸）

我正在研究如何应用实时壁纸（GIF图像）。当我点击应用按钮时，默认的gif图像设置为壁纸。我正在从firebase获取所有图像。因此，我想将该图像设置为壁纸。我不知道如何将该gif图像从

LiveViewActivity

传递到

gifwallperservice

以将该.gif图像设置为实时壁纸，而不是默认图像。（对不起，我的英语不好，希望你能理解）

LiveViewActivity

我在其中添加了一个按钮以应用实时墙纸

public class GIFWallpaperService extends WallpaperService {

    @Override
    public WallpaperService.Engine onCreateEngine() {

        try {

            Movie movie = Movie.decodeStream(getResources().getAssets().open("sea_gif.gif")); //Here is the default gif image

            return new GIFWallpaperEngine(movie);

        } catch (IOException e) {
            Log.d("GIFWallpaperService", "Could not loaded live wallpaper");
            return null;
        }

    }

    private class GIFWallpaperEngine extends WallpaperService.Engine {

        private final int frameDuration = 20;
        private SurfaceHolder holder;
        private Movie movie;
        private boolean visible;
        private Handler handler;

        public GIFWallpaperEngine(Movie movie) {

            this.movie = movie;
            handler = new Handler();

        }

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

            this.holder = surfaceHolder;

        }

        private Runnable drawGIF = new Runnable() {
            @Override
            public void run() {
                draw();
            }
        };

        private void draw() {

            if (visible) {
                Canvas canvas = holder.lockCanvas();
                canvas.save();
                canvas.scale(4f, 4f);

                movie.draw(canvas, -100, 0);

                canvas.restore();

                holder.unlockCanvasAndPost(canvas);
                movie.setTime((int) (System.currentTimeMillis() % movie.duration()));

                handler.removeCallbacks(drawGIF);
                handler.postDelayed(drawGIF, frameDuration);

            }

        }

        @Override
        public void onVisibilityChanged(boolean visible) {
            //super.onVisibilityChanged(visible);

            this.visible = visible;

            if (visible) {
                handler.post(drawGIF);
            } else {
                handler.removeCallbacks(drawGIF);
            }


        }

        @Override
        public void onDestroy() {
            super.onDestroy();
            handler.removeCallbacks(drawGIF);

        }
    }

}

在这里，我想将.gif图像传递给gif服务

public class LiveViewActivity extends AppCompatActivity {

    ImageView imageView;
    Button setLiveWallpaper;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_live_view);

        imageView = findViewById(R.id.viewImage);
        Glide.with(this).load(getIntent().getStringExtra("images")).into(imageView);

        setLiveWallpaper.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                applyLiveWallpaper();
            }
        });

    }

    private void applyLiveWallpaper() {
        Intent intent = new Intent(
                WallpaperManager.ACTION_CHANGE_LIVE_WALLPAPER);
        intent.putExtra(WallpaperManager.EXTRA_LIVE_WALLPAPER_COMPONENT,
                new ComponentName(this, GIFWallpaperService.class));
        startActivity(intent);
    }

}

礼品服务

这里我想接收从LiveViewActivity发送的.gif图像 设置为实时壁纸

public class GIFWallpaperService extends WallpaperService {

    @Override
    public WallpaperService.Engine onCreateEngine() {

        try {

            Movie movie = Movie.decodeStream(getResources().getAssets().open("sea_gif.gif")); //Here is the default gif image

            return new GIFWallpaperEngine(movie);

        } catch (IOException e) {
            Log.d("GIFWallpaperService", "Could not loaded live wallpaper");
            return null;
        }

    }

    private class GIFWallpaperEngine extends WallpaperService.Engine {

        private final int frameDuration = 20;
        private SurfaceHolder holder;
        private Movie movie;
        private boolean visible;
        private Handler handler;

        public GIFWallpaperEngine(Movie movie) {

            this.movie = movie;
            handler = new Handler();

        }

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

            this.holder = surfaceHolder;

        }

        private Runnable drawGIF = new Runnable() {
            @Override
            public void run() {
                draw();
            }
        };

        private void draw() {

            if (visible) {
                Canvas canvas = holder.lockCanvas();
                canvas.save();
                canvas.scale(4f, 4f);

                movie.draw(canvas, -100, 0);

                canvas.restore();

                holder.unlockCanvasAndPost(canvas);
                movie.setTime((int) (System.currentTimeMillis() % movie.duration()));

                handler.removeCallbacks(drawGIF);
                handler.postDelayed(drawGIF, frameDuration);

            }

        }

        @Override
        public void onVisibilityChanged(boolean visible) {
            //super.onVisibilityChanged(visible);

            this.visible = visible;

            if (visible) {
                handler.post(drawGIF);
            } else {
                handler.removeCallbacks(drawGIF);
            }


        }

        @Override
        public void onDestroy() {
            super.onDestroy();
            handler.removeCallbacks(drawGIF);

        }
    }

}

---

我不知道如何将.gif图像从

LiveViewActivity

发送和接收到

gifwallperservice

尝试使用DomainEventBus，它有助于在所有应用程序中传递对象、图像以及事实上的任何数据类型。

---

这样，您需要在创建服务时注册“事件总线”，它将能够从应用程序的任何组件接收映像。

您的问题对我来说有点模糊，但如果我没弄错，实际上，您可以通过上下文通过适配器轻松地在LiveWallperActivity中获取图片，然后通过此活动，您可以有意地将图像传递给任何您想要的活动

若要将数据从“活动”发送到“服务”，您需要重写OnStart命令，因为您可以直接访问intent：

Override
public int onStartCommand(Intent intent, int flags, int startId) {

然后从LiveViewActivity创建意图对象以启动服务，然后将图像名称放入意图对象中：

 Intent serviceIntent = new Intent(YourService.class.getName())
 serviceIntent.putExtra("IMAGE_KEY", "image");
 context.startService(serviceIntent);

当服务启动时，将调用其onStartCommand（）方法，然后您可以获得图像：

public int onStartCommand (Intent intent, int flags, int startId) {
String image = intent.getStringExtra("IMAGE_KEY");
return START_STICKY;
}

---

首先，我将图像从

livewallparactivity

传递到

LiveViewActivity

，在

LiveViewActivity

中，我有一个按钮（设置实时墙纸）。我想将图像从LiveViewActivity发送到纸质服务类，当点击按钮时，如果您在LvieViewActivity中有图像，然后需要将其发送到您的服务，您可以有意这样做，请再次检查我的答案。