我尝试在
Android中请求权限后执行片段事务 – 但应用程序会不断崩溃.为了避免这种情况,该代码可能如何更改？
任何帮助不胜感激
在发送电子邮件之前检查许可：
private void emailShare() {
if (mayRequestContacts()) {
emailShareImpl();
}
}
检查许可证：
private boolean mayRequestContacts() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
return true;
}
requestPermissions(new String[]{READ_CONTACTS},REQUEST_READ_CONTACTS);
return false;
}
许可证检查结果：
@Override
public void onRequestPermissionsResult(int requestCode,String[] permissions,int[] grantResults) {
if (requestCode == REQUEST_READ_CONTACTS) {
if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
emailShareImpl();
}
}
}
如果发放授权,则启动片段交易：
private void emailShareImpl() {
FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
EmailReferDialog mEmailReferDialog = new EmailReferDialog();
mEmailReferDialog.setCancelable(true);
mEmailReferDialog.show(fragmentManager,"EMAIL_REFER_DIALOG");
}
logcat的：
05-11 09:04:58.859 16113-16113/com.example E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example,PID: 16113
java.lang.RuntimeException: Failure delivering result ResultInfo{who=@android:requestPermissions:,request=65536,result=-1,data=Intent { act=android.content.pm.action.REQUEST_PERMISSIONS (has extras) }} to activity {com.example/com.example.DashboardActivity}: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
at android.app.ActivityThread.deliverResults(ActivityThread.java:3743)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3786)
at android.app.ActivityThread.-wrap16(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1412)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5466)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1493)
at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1511)
at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:638)
at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:617)
at android.support.v4.app.DialogFragment.show(DialogFragment.java:139)
at com.example.ReferFragment.emailShareImpl(ReferFragment.java:222)
at com.example.ReferFragment.onRequestPermissionsResult(ReferFragment.java:140)
at android.support.v4.app.FragmentActivity.onRequestPermissionsResult(FragmentActivity.java:894)
at android.app.Activity.dispatchRequestPermissionsResult(Activity.java:6582)
at android.app.Activity.dispatchActivityResult(Activity.java:6460)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3739)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3786)
at android.app.ActivityThread.-wrap16(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1412)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5466)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
解决方法
这是因为在活动的onResume之前调用了onRequestPermissionresult.你可以简单的解决这个问题：
private boolean mShareEmail = false;
@Override
public void onRequestPermissionsResult(int requestCode,int[] grantResults) {
if (requestCode == REQUEST_READ_CONTACTS) {
if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
mShareEmail = true;
}
}
}
@Override
public void onResume() {
super.onResume();
if (mShareEmail) {
emailShareImpl();
mShareEmail = false;
}
}
