Question

继续评价我的功能.. 在这个问题...... 我在片段中写了评价我的功能代码，命名为RateUss ... 但问题是，我没有一个确切的地方在哪里启动那部分代码，然后用户点击导航视图上的按钮速率所以这个速率我对话框将出现

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

/**
 * A simple {@link Fragment} subclass.
 */
public class RateUss extends Fragment {
private final static String APP_TITLE = "App Rater";
private final static String APP_PACKAGE_NAME = "com.example.rajafarid.navigation";

private final static int DAYS_UNTIL_PROMPT = 0;
private final static int LAUNCH_UNTIL_PROMPT = 3;

public RateUss() {
    // Required empty public constructor
}


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

    return container;}

评估我们定义费率对话框的功能

public static void app_launched(Context context){
    SharedPreferences prefs = context.getSharedPreferences("rate_app",0);
    if (prefs.getBoolean("dontshowagain", false)){
        return;
    }
    SharedPreferences.Editor editor = prefs.edit();

    long launch_count = prefs.getLong("launch_count", 0) + 1;
    editor.putLong("launch_count", launch_count);

    Long date_firstLaunch = prefs.getLong("date_first_launch", 0);
    if (date_firstLaunch ==0){
        date_firstLaunch = System.currentTimeMillis();
        editor.putLong("date_first_launch", date_firstLaunch);

    }

    if (launch_count >= LAUNCH_UNTIL_PROMPT) {
        if (System.currentTimeMillis() >= date_firstLaunch + (DAYS_UNTIL_PROMPT * 24 *60*60*1000)){
            showRateDialog(context, editor);
        }
    }
    editor.commit();
}
public static void showRateDialog(final Context context, final SharedPreferences.Editor editor){

    Dialog dialog = new Dialog(context);

    AlertDialog.Builder builder = new AlertDialog.Builder(context);

    String message = "If you enjoy Using"
            + APP_TITLE
            + ", Please take a moment to rate the app. "
            + "Thank you for your support!";

    builder.setMessage(message)
            .setTitle("Rate " + APP_TITLE)
            .setIcon(context.getApplicationInfo().icon)
            .setCancelable(false)
            .setPositiveButton("Rate Now", new DialogInterface.OnClickListener(){

                @Override
                public void onClick(DialogInterface dialog, int which) {

                    editor.putBoolean("dontshowagain", true);
                    editor.commit();

                    try {
                        context.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + APP_PACKAGE_NAME)));
                    }catch (ActivityNotFoundException e) {
                        Toast.makeText(context, "You Have pressed Rate Now Button", Toast.LENGTH_SHORT) .show();
                    }
                    dialog.dismiss();
                }
            })
            .setNeutralButton("Later", new DialogInterface.OnClickListener()         {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    Toast.makeText(context, "You have Pressed Later Button", Toast.LENGTH_SHORT).show();
                    dialog.dismiss();
                }
            })
            .setNegativeButton("No, Thanks", new       DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    if (editor!=null){
                        editor.putBoolean("dontshowagain", true);
                        editor.commit();
                    }
                    Toast.makeText(context, "You have pressed No, Thanks button", Toast.LENGTH_SHORT).show();
                    dialog.dismiss();
                }
            });
    dialog = builder.create();
    dialog.show();

}

}

在这里堆栈跟踪......

java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
                                                                                at android.view.ViewGroup.addViewInner(ViewGroup.java:4187)
                                                                                at android.view.ViewGroup.addView(ViewGroup.java:4040)
                                                                                at android.view.ViewGroup.addView(ViewGroup.java:3985)
                                                                                at android.view.ViewGroup.addView(ViewGroup.java:3961)
                                                                                at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1083)
                                                                                at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252)
                                                                                at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)
                                                                                at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617)
                                                                                at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517)
                                                                                at android.os.Handler.handleCallback(Handler.java:739)
                                                                                at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                                at android.os.Looper.loop(Looper.java:145)
                                                                                at android.app.ActivityThread.main(ActivityThread.java:5832)
                                                                                at java.lang.reflect.Method.invoke(Native Method)
                                                                                at java.lang.reflect.Method.invoke(Method.java:372)
                                                                                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
                                                                                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)

Answer 1

您将在container中返回错误的onCreateView。你必须创建片段视图并返回它，可能会膨胀一些xml，或者如果片段没有ui则返回null。我建议你阅读：

http://developer.android.com/intl/es/guide/components/fragments.html#Creating

给我评价非法状态例外

1 个答案: