Question

我有一个片段，其中包含用户必须填写的一些字段。让我们举个例如电话号码。当用户输入数字时，片段从MainActivity调用一个方法，并且在mainActivity中完成了一些操作，我们假设：

1-验证

2-验证

我使用BroadcarstReceiver从MainActivity回传到Fragment。因此，当验证完成后，我使用BroadcastReceiver向片段发送一个标志，向用户显示progressDialog。

此时，progressDialog应该显示，直到收到另一个验证标志。

问题是我遇到了一些关于RuntimeException的错误，应用程序崩溃的时候应该显示progressDialog。

public class ProfileFragment extends Fragment {

    ProgressDialog progressDialog;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_profile, container, false);

        ...

        progressDialog = new ProgressDialog(getContext());
        progressDialog.setContentView(R.layout.custom_progressdialog);

        ...

        return rootView;
    }

    protected BroadcastReceiver ActivityDataReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        if(ACTION_INTENT.equals(intent.getAction())) {
            progressDialog.show();
        }
        if(ACTION_INTENT2.equals(intent.getAction())) {
            progressDialog.dismiss();
        }
    }
}

这是logcat显示的内容：

FATAL EXCEPTION: main
Process: com.detgsm, PID: 21736
android.util.AndroidRuntimeException: requestFeature() must be called before adding content 
    at com.android.internal.policy.PhoneWindow.requestFeature(PhoneWindow.java:398)
    at com.android.internal.app.AlertController.installContent(AlertController.java:249)
    at android.app.AlertDialog.onCreate(AlertDialog.java:423)
    at android.app.ProgressDialog.onCreate(ProgressDialog.java:249)
    at android.app.Dialog.dispatchOnCreate(Dialog.java:578)
    at android.app.Dialog.show(Dialog.java:314)
    at com.detgsm.ProfileFragment$7.onReceive(ProfileFragment.java:271)
    at android.support.v4.content.LocalBroadcastManager.executePendingBroadcasts(LocalBroadcastManager.java:297)
    at android.support.v4.content.LocalBroadcastManager.access$000(LocalBroadcastManager.java:46)
    at android.support.v4.content.LocalBroadcastManager$1.handleMessage(LocalBroadcastManager.java:116)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:158)
    at android.app.ActivityThread.main(ActivityThread.java:7224)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

Answer 1

在显示进度对话框之前，您无法设置contentView。见link

您可以找到更多信息here。

Answer 2

请更改为以下代码

   public class ProfileFragment extends Fragment {

ProgressDialog progressDialog;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                     Bundle savedInstanceState) {

    progressDialog = new ProgressDialog(getContext());
    progressDialog.setContentView(R.layout.custom_progressdialog);


}

protected BroadcastReceiver ActivityDataReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
    if(ACTION_INTENT.equals(intent.getAction())) {
          getActivity().runOnUiThread(new Runnable() {
              @Override
              public void run() {
              progressDialog.show();
              }
         });
    }
    if(ACTION_INTENT2.equals(intent.getAction())) {
        progressDialog.dismiss();
    }
}
}

在片段BroadcastReceiver

2 个答案: