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Android之悬浮窗实现

news 来源：原创 2025/5/10 1:43:05

文章目录

前言
一、效果图
二、实现步骤
- 1.AndroidManifest权限以及service注册
- 2.service代码
- 3.activity实现
总结

前言

经常接触音视频以及直播的同学应该知道，悬浮窗是必备需求，今天就记录一下自己悬浮窗的视线过程，流程就是点击缩小按钮回到桌面，把悬浮窗放桌面，点击悬浮窗回到应用界面。

一、效果图

效果图一张为正常界面，一张为悬浮窗效果界面。
在这里插入图片描述

二、实现步骤

1.AndroidManifest权限以及service注册

代码如下（示例）：

    <!--悬浮窗-->
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />


 	 <!-- 悬浮窗Service -->
        <service
            android:name=".service.FloatingWindowService"
            android:enabled="true"
            android:exported="false"/>

2.service代码

代码如下（示例）：

/**
 * @Author : CaoLiulang
 * @Time : 2025/3/18 13:22
 * @Description :悬浮窗service
 */
public class FloatingWindowService extends Service {
    private WindowManager windowManager;
    private View floatingView;
    private ScheduledExecutorService executor;
    // 定义变量记录初始触摸点和窗口初始位置
    private float initialTouchX, initialTouchY;
    private float startX; // 声明为成员变量
    private float startY;

    @Override
    public void onCreate() {
        super.onCreate();
        executor = Executors.newSingleThreadScheduledExecutor();
        createFloatingWindow();
    }

    private void createFloatingWindow() {
        // 引入悬浮窗口布局
        floatingView = LayoutInflater.from(this).inflate(R.layout.livestreamingconsolesx, null);
        windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
        // 窗口参数设置
        WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                380,  // 显式设置宽度（像素）
                600,  // 显式设置高度（像素）
                Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ?
                        WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY :
                        WindowManager.LayoutParams.TYPE_PHONE,
                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                        | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
                PixelFormat.TRANSLUCENT);

        params.gravity = Gravity.START | Gravity.TOP;
        params.x = 20;
        params.y = 20;
        windowManager.addView(floatingView, params);
        floatingView.setOnTouchListener((v, event) -> {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    initialTouchX = event.getRawX() - params.x;
                    initialTouchY = event.getRawY() - params.y;
                    startX = event.getRawX();
                    startY = event.getRawY();
                    break;
                case MotionEvent.ACTION_MOVE:
                    float newX = event.getRawX() - initialTouchX;
                    float newY = event.getRawY() - initialTouchY;
                    // 获取屏幕尺寸
                    WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
                    DisplayMetrics metrics = new DisplayMetrics();
                    if (wm != null) {
                        wm.getDefaultDisplay().getMetrics(metrics);
                        int screenWidth = metrics.widthPixels;
                        int screenHeight = metrics.heightPixels;

                        // 限制移动范围
                        newX = Math.max(0, Math.min(newX, screenWidth - params.width));
                        newY = Math.max(0, Math.min(newY, screenHeight - params.height));
                    }
                    params.x = (int) newX;
                    params.y = (int) newY;
                    windowManager.updateViewLayout(floatingView, params);
                    return true;
                case MotionEvent.ACTION_UP:
                    // 计算移动距离
                    float deltaX = Math.abs(event.getRawX() - startX);
                    float deltaY = Math.abs(event.getRawY() - startY);

                    // 如果移动距离小于阈值，视为点击
                    if (deltaX < 5 && deltaY < 5) {
                        // 手动触发点击事件
                        floatingView.performClick();
                    }
                    return true;
            }
            return false;
        });

        // 单独设置 OnClickListener
        floatingView.setOnClickListener(v -> {
            // 点击逻辑  这里是跳转本软件，有的手机会重启，所以直接选择下面方式跳转当前界面
            //Intent intent = getPackageManager().getLaunchIntentForPackage("这里就是自己的包名");
            //if (intent != null) {
                //intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
               // startActivity(intent);
            //}
            //跳转当前界面
            Intent intent = new Intent(this, LiveStreamingConsole.class);
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
            startActivity(intent);
            //延迟一秒关闭
            executor.schedule(() -> stopSelf(), 1, TimeUnit.SECONDS);
        });
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        // 关闭线程池（根据实际情况选择是否立即关闭）
        executor.shutdownNow();
        if (floatingView != null) windowManager.removeView(floatingView);
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

3.activity实现

//定义变量
private var YOUR_REQUEST_CODE = 1000
//调用 动态判断权限
 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                    if (!Settings.canDrawOverlays(this)) {
                        val intent = Intent(
                            Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
                            Uri.parse("package:$packageName")
                        )
                        startActivityForResult(intent, YOUR_REQUEST_CODE)
                    } else {
                        createFloatingWindow();
                    }
                }

 @RequiresApi(Build.VERSION_CODES.O)
    private fun createFloatingWindow() {
        //启动service
        startService(Intent(this, FloatingWindowService::class.java))
        // 返回桌面
        moveTaskToBack(true)
    }

    @RequiresApi(Build.VERSION_CODES.O)
    override fun onActivityResult(requestCode: Int, resultCode: Int, @Nullable data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (requestCode == YOUR_REQUEST_CODE) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && Settings.canDrawOverlays(
                    this
                )
            ) {
                createFloatingWindow()
            } else {
                Toast.makeText(this, "需要悬浮窗权限", Toast.LENGTH_SHORT).show()
            }
        }
    }