试图为Android M实现摄像头权限获取无虚拟方法checkSelfPermission

我尝试以这种方式实现相机权限:

private void checkCameraPermissions() { if(checkCameraHardware(this)) { if (checkSelfPermission(Manifest.permission_group.camera) != PackageManager.PERMISSION_GRANTED) { Crashlytics.log("Requesting camera permission"); // Should we show an explanation? if (shouldShowRequestPermissionRationale( Manifest.permission_group.camera)) { // Explain to the user why we need to use the camera showRationaleForCameraUse(); } requestPermissions(new String[]{Manifest.permission_group.camera}, Constants.MY_PERMISSIONS_REQUEST_CAMERA_GROUP); // MY_PERMISSIONS_REQUEST_CAMERA_GROUP is an // app-defined int constant } else { startApp(); } }else{ showNoCameraAvailableAlert(); } } @Override public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) { switch (requestCode) { case Constants.MY_PERMISSIONS_REQUEST_CAMERA_GROUP: { if (grantResults[0] == PackageManager.PERMISSION_GRANTED) { // permission was granted, yay! // start the app startApp(); } else { // permission denied, boo! // leav the app! showNoCameraAvailableAlert(); } return; } // other 'switch' lines to check for other // permissions this app might request } } 

并得到以下错误:

 java.lang.NoSuchMethodError: No virtual method checkSelfPermission(Ljava/lang/String;)I in class Lim/emu/app/emu/app/view/splash/SplashActivity; or its super classes (declaration of 'im.emu.app.emu.app.view.splash.SplashActivity' appears in /data/app/im.emu.app.emu.test-1/base.apk) at im.emu.app.emu.app.view.splash.SplashActivity.checkCameraPermissions(SplashActivity.java:74) at im.emu.app.emu.app.view.splash.SplashActivity.onCreate(SplashActivity.java:52) at android.app.Activity.performCreate(Activity.java:5977) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2258) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2367) at android.app.ActivityThread.access$800(ActivityThread.java:148) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1283) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5274) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:909) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:704) 08-30 16:34:10.801 17087-17357/im.emu.app.emu.test I/Fabric﹕ Crashlytics report upload complete: 55E30629033A-0001-42BF-296ED8AC703A.cls 

我有什么想法可以解决这个问题? ps如果需要更多信息,请询问

您应该在运行以前版本的设备上运行代码。 您必须使用ContextCompat.checkSelfPermission()

小心

 'shouldShowRequestPermissionRationale( Manifest.permission_group.camera)' 

我在权限组中遇到了个人权限而不是组的问题,如果您使用了另一个,则会抛出exception。

您必须使用ActivityCompat.checkSelfPermission()代替Pre-Lollipop设备上的后向function。 所以this.checkSelfPermission()只能用于声明minSdkVersion 23应用程序

您忘记在AndroidManifest.xml中授予权限