Android系统覆盖窗口

Question

我正在尝试创建一个系统覆盖.但我一直得到"许可被拒绝".我正在使用SDK版本23.

我的清单文件:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.test" >

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

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".activity.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</manifest>

我用来创建叠加层的代码:

    //mView = new HUDView(this);
    mButton = new Button(this);
    mButton.setText("Overlay button");
    mButton.setOnTouchListener(this);

    WindowManager.LayoutParams params = new WindowManager.LayoutParams(
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.TYPE_SYSTEM_ALERT,
            WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
            PixelFormat.TRANSLUCENT);
    params.gravity = Gravity.RIGHT | Gravity.TOP;
    params.setTitle("Load Average");
    WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
    wm.addView(mButton, params);

Answer 1

首先,没有命名的权限SYSTEM_OVERLAY_WINDOW.是的SYSTEM_ALERT_WINDOW.

其次,如果你targetSdkVersion是23或更高,并且你在Android 6.0+设备上运行,你的应用程序将不会在一开始就获得此权限.调用Settings.canDrawOverlays()以查看您是否拥有该权限,并在不使用ACTION_MANAGE_OVERLAY_PERMISSION时将用户引导至"设置".

Answer 2

在AndroidManifest中(版本<23)

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


public static int ACTION_MANAGE_OVERLAY_PERMISSION_REQUEST_CODE= 5469;
//Random value

    public void testPermission() {
        if (!Settings.canDrawOverlays(this)) {
            Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
                    Uri.parse("package:" + getPackageName()));
            startActivityForResult(intent, ACTION_MANAGE_OVERLAY_PERMISSION_REQUEST_CODE);
        }
    }

结果:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == ACTION_MANAGE_OVERLAY_PERMISSION_REQUEST_CODE) {
        if (Settings.canDrawOverlays(this)) {
            // You have permission
        }
    }
}