API 26 上的 SYSTEM_ALERT_WINDOW PERMISSION 未按预期工作。窗口类型 2002 的权限被拒绝

Question

我正在使用覆盖权限在我的应用程序中显示某些信息。在 API 23 - 25 上运行它工作正常（根据要求请求许可、授予等

无法添加窗口 android.view.ViewRoot$W@44da9bc0 - 此窗口类型的权限被拒绝）。 （非常感谢 ceph3us！）

在 API 26 上尝试相同的操作时我收到一个错误，基本上是“窗口类型 2002 的权限被拒绝”

 windowManager.addView(frameLayout, params);

谷歌是否改变了覆盖的方式？任何想法，如何在 Android 8 (Oreo)、API 26 中将我的文本作为覆盖图显示在屏幕上？谢谢你的想法！

这是错误日志：

 08-24 16:41:56.730 2615-2615/net.zwittscha.testoverlay E/AndroidRuntime: FATAL EXCEPTION: main
Process: net.zwittscha.testoverlay, PID: 2615
java.lang.RuntimeException: Unable to start activity ComponentInfo{net.zwittscha.testoverlay/net.zwittscha.testoverlay.MainActivity}:
                android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@6fa0089 --
                permission denied for window type 2002
 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
 at android.app.ActivityThread.-wrap11(Unknown Source:0)
 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
 at android.os.Handler.dispatchMessage(Handler.java:105)
 at android.os.Looper.loop(Looper.java:164)
 at android.app.ActivityThread.main(ActivityThread.java:6541)
 at java.lang.reflect.Method.invoke(Native Method)
 at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
            Caused by: android.view.WindowManager$BadTokenException:
            Unable to add window android.view.ViewRootImpl$W@6fa0089 --
            permission denied for window type 2002
 at android.view.ViewRootImpl.setView(ViewRootImpl.java:789)
 at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:356)
 at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:92)
 at net.zwittscha.testoverlay.MainActivity.createOnTopView(MainActivity.java:46)
 at net.zwittscha.testoverlay.MainActivity.checkDrawOverlayPermission(MainActivity.java:66)
 at net.zwittscha.testoverlay.MainActivity.onCreate(MainActivity.java:28)
 at android.app.Activity.performCreate(Activity.java:6975)
 at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1213)
 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2770)
 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
 at android.app.ActivityThread.-wrap11(Unknown Source:0)
 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
 at android.os.Handler.dispatchMessage(Handler.java:105)
 at android.os.Looper.loop(Looper.java:164)
 at android.app.ActivityThread.main(ActivityThread.java:6541)
 at java.lang.reflect.Method.invoke(Native Method)
 at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

在我的清单中，我有：

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

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

这是我的主要活动：

     public class MainActivity extends AppCompatActivity {

DrawView dv;
FrameLayout frameLayout;
WindowManager windowManager;
LayoutInflater layoutInflater;
/** code to post/handler request for permission */
public final static int REQUEST_CODE = 1234;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    checkDrawOverlayPermission();
}

public void createOnTopView() {

    WindowManager.LayoutParams params = new WindowManager.LayoutParams(
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.TYPE_PHONE,
            WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE,
            PixelFormat.TRANSLUCENT);
    params.gravity = Gravity.CENTER;

    if (frameLayout == null) frameLayout = new FrameLayout(getApplicationContext());
    if (dv == null) dv = new DrawView(getApplicationContext());

    windowManager = (WindowManager)
            getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
    windowManager.addView(frameLayout, params);
    windowManager.addView(dv, params);

    layoutInflater = (LayoutInflater)
            getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    // Here is the place where you can inject whatever layout you want.
    layoutInflater.inflate(R.layout.activity_main, frameLayout);
}

public void checkDrawOverlayPermission() {
    /* check if we already  have permission to draw over other apps */
    if (android.os.Build.VERSION.SDK_INT > 22) {
        if (!Settings.canDrawOverlays(this)) {
        /* if not construct intent to request permission */
            Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
                    Uri.parse("package:" + getPackageName()));
        /* request permission via start activity for result */
            startActivityForResult(intent, REQUEST_CODE);
        }
        else {
            createOnTopView();
        }
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode,  Intent data) {
    /* check if received result code
     is equal our requested code for draw permission  */
    if (requestCode == REQUEST_CODE && android.os.Build.VERSION.SDK_INT > 22) {
   /* if so check once again if we have permission */
        if (Settings.canDrawOverlays(this)) {
            createOnTopView();
        }
    }
}
}

这是 DrawView：

     public class DrawView extends View {

int w;
int h;
int r;
float screenFactor;
TextPaint startTextPaint;

public DrawView(Context activity) {
    super(activity);
}

@Override
protected void onSizeChanged(int width, int height, int oldw, int oldh) {

        w = width;
        h = height;
        r = w / 2;

    screenFactor = (r / 160f);

    if (startTextPaint == null) startTextPaint = new TextPaint();

    startTextPaint.setTextSize(100);
    startTextPaint.setTextAlign(Paint.Align.CENTER);
    startTextPaint.setTypeface(Typeface.create("Roboto Condensed", Typeface.BOLD));

    super.onSizeChanged(w, h, oldw, oldh);
}

@Override
protected void onDraw(Canvas canvas) {

        startTextPaint.setARGB(255,255,0,0);
        canvas.drawText("Test", w / 2, h / 2, startTextPaint);
}
}

原文由 tomseitz 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

根据针对 Android 8.0 的应用程序的 Android 8.0 行为更改 文档：

使用 SYSTEM_ALERT_WINDOW 权限的应用程序不能再使用以下窗口类型在其他应用程序和系统窗口之上显示警报窗口：

 TYPE_PHONE
TYPE_PRIORITY_PHONE
TYPE_SYSTEM_ALERT
TYPE_SYSTEM_OVERLAY
TYPE_SYSTEM_ERROR

相反，应用程序必须使用名为 TYPE_APPLICATION_OVERLAY 的新窗口类型。

所以你的应用程序可以针对一些较低的版本。在这种情况下，您的警报窗口将…

始终出现在使用 TYPE_APPLICATION_OVERLAY 窗口类型的窗口下方。如果应用程序以 Android 8.0（API 级别 26）为目标，则该应用程序使用 TYPE_APPLICATION_OVERLAY 窗口类型来显示警报窗口。

（引自同一来源）

原文由 Bö macht Blau 发布，翻译遵循 CC BY-SA 3.0 许可协议