我試圖讓READ_CONTACTS許可版本的Android M和調用:得到錯誤,同時要求READ_CONTACTS許可版本的Android M
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_CONTACTS}, 1);
應用程序崩潰與以下情況除外:
05-12 17:08:24.578: E/AndroidRuntime(2846): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.packageinstaller/com.android.packageinstaller.permission.ui.GrantPermissionsActivity}: java.lang.NullPointerException: Attempt to get length of null array
05-12 17:08:24.578: E/AndroidRuntime(2846): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
05-12 17:08:24.578: E/AndroidRuntime(2846): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
05-12 17:08:24.578: E/AndroidRuntime(2846): at android.app.ActivityThread.-wrap11(ActivityThread.java)
05-12 17:08:24.578: E/AndroidRuntime(2846): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
05-12 17:08:24.578: E/AndroidRuntime(2846): at android.os.Handler.dispatchMessage(Handler.java:102)
05-12 17:08:24.578: E/AndroidRuntime(2846): at android.os.Looper.loop(Looper.java:148)
05-12 17:08:24.578: E/AndroidRuntime(2846): at android.app.ActivityThread.main(ActivityThread.java:5417)
05-12 17:08:24.578: E/AndroidRuntime(2846): at java.lang.reflect.Method.invoke(Native Method)
05-12 17:08:24.578: E/AndroidRuntime(2846): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
05-12 17:08:24.578: E/AndroidRuntime(2846): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
05-12 17:08:24.578: E/AndroidRuntime(2846): Caused by: java.lang.NullPointerException: Attempt to get length of null array
05-12 17:08:24.578: E/AndroidRuntime(2846): at com.android.packageinstaller.permission.ui.GrantPermissionsActivity.computePermissionGrantState(GrantPermissionsActivity.java:293)
05-12 17:08:24.578: E/AndroidRuntime(2846): at com.android.packageinstaller.permission.ui.GrantPermissionsActivity.updateDefaultResults(GrantPermissionsActivity.java:343)
05-12 17:08:24.578: E/AndroidRuntime(2846): at com.android.packageinstaller.permission.ui.GrantPermissionsActivity.onCreate(GrantPermissionsActivity.java:100)
05-12 17:08:24.578: E/AndroidRuntime(2846): at android.app.Activity.performCreate(Activity.java:6251)
05-12 17:08:24.578: E/AndroidRuntime(2846): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
05-12 17:08:24.578: E/AndroidRuntime(2846): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
我也曾在指定<uses-permission android:name="android.permission.READ_CONTACTS" />
Manifest文件。
你確定你的問題中的代碼是什麼產生這個堆棧跟蹤?我對該堆棧跟蹤的解釋表明,也許你意外地用'null''字符串[]'調用'requestPermissions()'。 – CommonsWare
您是否擁有在清單中正確位置列出的權限?也就是說,在''標籤之外。 –
@MikeM。謝謝男人,我無意中把它放在應用程序標籤中,它現在正在工作。 –