Service 使用 WindowManager addView

青旅半醒 2023-09-28 19:25 12阅读 0赞

首先写一个Activity启动Service（我这里用的是startService()）

设定一个点击事件去启动Service.

public class MainActivity extends AppCompatActivity {
    
        private Button button;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            button = findViewById(R.id.button);
            Intent intent = new Intent(this, MyService.class);
            button.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    startService(intent);
                    Toast.makeText(MainActivity.this, "wobeidianjile", Toast.LENGTH_SHORT).show();
                }
            });
        }
    
    }

之后再进行Service编写

LayoutParams.type一定要设定为WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;不然会报错，当前没有Activity再运行。

public class MyService extends Service {
        private WindowManager mWindowManager;
        private WindowManager.LayoutParams mLayoutParams;
        private View mLayoutView;
    
        @Nullable
        @Override
        public IBinder onBind(Intent intent) {
            throw new UnsupportedOperationException("Not yet implemented");
        }
    
        @Override
        public void onCreate() {
            super.onCreate();
            init();
            addView();
        }
    
        private void init() {
            mWindowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
            mLayoutParams = new WindowManager.LayoutParams();
            mLayoutParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
            mLayoutParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
            mLayoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
            mLayoutParams.flags = WindowManager.LayoutParams.FLAG_FULLSCREEN
                    | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
                    | WindowManager.LayoutParams.FLAG_BLUR_BEHIND //设置外部模糊
            mLayoutParams.format = PixelFormat.TRANSLUCENT; //不设置这个弹出框的透明遮罩显示为黑色
            mLayoutParams.systemUiVisibility = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY | View.SYSTEM_UI_FLAG_FULLSCREEN;//隐藏导航栏
            mLayoutView = View.inflate(this, R.layout.privacy_file, null);
        }
    
        private void addView() {
            mWindowManager.addView(mLayoutView, mLayoutParams);
        }
    
    }

进行Manifest编写，Manifest引入Service以及设置如下权限

<?xml version="1.0" encoding="utf-8"?>
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
        <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    
        <application
            <service android:name=".MyService" />
        </application>
    
    </manifest>

当然，还是可能会出现TYPE\_APPLICATION\_OVERLAY 2038错误

原因：需要手动开启权限，代码如下会弹出一个权限设置（startActivityForResult是必须在Activity来做的，可以先写个Activity进行设置权限之后再进行删除）

Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION);
                    intent.setData(Uri.parse("package:" + getPackageName()));
                    startActivityForResult(intent, 100);

宗上，就完成了简单的Service 通过WindowManager进行addView操作。