Question

因此，我创建了一个应用，该应用会根据从您的出发地到目的地的预计时间，在您的出发时间前25分钟设置闹钟。

我能够构建该应用程序，但是每当我按下搜索按钮时，该应用程序就会崩溃。我猜想它与placeautocomplete片段的集成有关，但不确定如何处理。

主要活动

    package com.example.mobileassignment2.buildingblocks;

import android.app.AlarmManager;
import android.app.DialogFragment;
import android.app.PendingIntent;
import android.app.TimePickerDialog;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;

import com.google.android.gms.common.api.Status;
import com.google.android.gms.location.places.Place;
import com.google.android.gms.location.places.ui.PlaceAutocompleteFragment;
import com.google.android.gms.location.places.ui.PlaceSelectionListener;

import org.json.JSONArray;
import org.json.JSONObject;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity implements TimePickerDialog .OnTimeSetListener{

    String DistanceResult;
    String DurationResult;

    String LeaveByHour;
    String LeaveByMin;

    String AlarmTimeHour;
    String AlarmTimeMin;

    int ArriveHour;
    int ArriveMin;

    int AlarmHour;
    int AlarmMin;

    Calendar alarmCalendar;


    @Override
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {

        TextView textViewArriveByTime = (TextView)findViewById(R.id.textViewArriveByTime);
        textViewArriveByTime.setText("Hour: "+ hourOfDay +"\n"+ "Minute: "+minute);

        ArriveHour = hourOfDay;
        ArriveMin = minute;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activitiy_main);

        Button button = (Button) findViewById(R.id.ArriveByBtn);
        button.setOnClickListener(new View.OnClickListener(){

            @Override
            public void onClick(View v){
                DialogFragment timePicker = new TimePickerFragment();
                timePicker.show(getFragmentManager(), "time picker");

            }

        });


Reset();
    }



    public void Reset(){
        DistanceResult = "";
        DurationResult = "";
        TextView Distance_Output = (TextView) findViewById(R.id.DistanceResult);
        TextView Duration_Output = (TextView) findViewById(R.id.DurationResult);
        Distance_Output.setText("Distance: " + DistanceResult);
        Duration_Output.setText("Duration: " + DurationResult);


        LeaveByMin = "";
        AlarmTimeMin = "";
        TextView LeaveBy_Calculated = (TextView) findViewById(R.id.LeaveBy);
        LeaveBy_Calculated.setText("Leave By: " + LeaveByMin);
        TextView AlarmTime_Calculated = (TextView) findViewById(R.id.AlarmTime);
        AlarmTime_Calculated.setText("Alarm Time: " + AlarmTimeMin);

        TextView textViewArriveByTime = (TextView)findViewById(R.id.textViewArriveByTime);
        textViewArriveByTime.setText("Hour: "+"\n"+ "Minute: ");


    }

    private static final String TAG = "MainActivity";



    public void SearchDistanceCommand(View view) {


        PlaceAutocompleteFragment Start_Location = (PlaceAutocompleteFragment)
                getFragmentManager().findFragmentById(R.id.StartLocation);

        Start_Location.setOnPlaceSelectedListener(new PlaceSelectionListener() {
            @Override
            public void onPlaceSelected(Place place) {
                // TODO: Get info about the selected place.
                Log.i(TAG, "Place: " + place.getName());
            }

            @Override
            public void onError(Status status) {
                // TODO: Handle the error.
                Log.i(TAG, "An error occurred: " + status);
            }
        });



        PlaceAutocompleteFragment Goal_Location = (PlaceAutocompleteFragment)
                getFragmentManager().findFragmentById(R.id.GoalLocation);

        Goal_Location.setOnPlaceSelectedListener(new PlaceSelectionListener() {
            @Override
            public void onPlaceSelected(Place place) {
                // TODO: Get info about the selected place.
                Log.i(TAG, "Place: " + place.getName());
            }

            @Override
            public void onError(Status status) {
                // TODO: Handle the error.
                Log.i(TAG, "An error occurred: " + status);
            }
        });


        Reset();

        if(Start_Location.toString().isEmpty()|| Goal_Location.toString().isEmpty()){
            Toast MissingTextErrorHandle = Toast.makeText(getApplicationContext(), "You need to input data into both fields!", Toast.LENGTH_SHORT);
            MissingTextErrorHandle.show();
        }
        else
        {
            new AsyncTaskParseJson().execute();
        }
    }

    public class AsyncTaskParseJson extends AsyncTask<String, String, String> {

        EditText Start_Location = (EditText) findViewById(R.id.StartLocation);
        EditText Goal_Location = (EditText) findViewById(R.id.GoalLocation);
        //To convert to UTC, how to use time picker
      //  EditText Arrive_By = (EditText) findViewById(R.id.ArriveBy);

        String FormattedStartLocation = Start_Location.getText().toString().replaceAll(" ", "+");
        String FormattedGoalLocation = Goal_Location.getText().toString().replaceAll(" ", "+");

        String yourServiceUrl = "https://maps.googleapis.com/maps/api/distancematrix/json?units=metric&origins=" + FormattedStartLocation + "&destinations=" + FormattedGoalLocation
               /* + "&arrival_time=" + Arrive_By*/
                + "&key=___MY___SECRET___KEY___";

        @Override
        protected void onPreExecute() {
            ProgressBar spinner;
            spinner = (ProgressBar) findViewById(R.id.progressBar1);
            spinner.setVisibility(View.VISIBLE);
        }

        @Override
        protected String doInBackground(String... arg0) {
            try {
                httpConnect jParser = new httpConnect();
                String json = jParser.getJSONFromUrl(yourServiceUrl);
                JSONObject object = new JSONObject(json);

                //contains ALL routes
                JSONArray array = object.getJSONArray("rows");
                // Get the first route
                JSONObject route = array.getJSONObject(0);
                // Take all elements
                JSONArray elements = route.getJSONArray("elements");
                //Take First Element
                JSONObject element = elements.getJSONObject(0);

                // Get Duration
                JSONObject durationObject = element.getJSONObject("duration");
                String duration = durationObject.getString("text");
                DurationResult = duration;

                // Get Distance
                JSONObject distanceObject = element.getJSONObject("distance");
                String distance = distanceObject.getString("text");
                DistanceResult = distance;

               //Get Leave By Time (ATTENTION!!: Need to edit for when duration > 1hr)

              String sDMin = DurationResult;

              //Nic: Remove Characters, Convert duration str to int, !!Assume duration is <1 Hr
              sDMin = sDMin.replaceAll( " mins", "" );
              int dMin = Integer.parseInt(sDMin);

                int remMin = dMin % 60;
                int remHour = dMin / 60;

                int leaveHour = ArriveHour - remHour;
                if (leaveHour < 0){
                    leaveHour = 23;
                }
                int leaveMin = ArriveMin - remMin -5;
                if (leaveMin < 0){
                    leaveHour -= 1;
                    leaveMin += 60;
                    if (leaveHour < 0){
                        leaveHour = 23;
                    }

                }

                //Convert int to str for printing
                String sLeaveHour = Integer.toString(leaveHour);
                String sLeaveMin = Integer.toString(leaveMin);
                LeaveByHour = sLeaveHour;
                LeaveByMin = sLeaveMin;


                //Get Alarm Time (int value), alarmManager later

                //String sATMin = DurationResult;

                //Nic: Remove Characters, Convert duration str to int, !!Assume duration is <1 Hr
                //sATMin = sATMin.replaceAll( " mins", "" );
                //int atMin = Integer.parseInt(sATMin);

                /*int remAlarmMin = (atMin % 60) - 30;
                int remAlarmHour = atMin / 60;


                int alarmHour = ArriveHour - remAlarmHour;
                int alarmMin = ArriveMin - remAlarmMin;
                if (alarmMin < 0){
                    alarmHour -= 1;
                    alarmMin += 60;*/

                int alarmHour = leaveHour;
                if(alarmHour < 0){
                    alarmHour = 23;
                }
                int alarmMin = leaveMin - 30;
                if (alarmMin < 0){
                    alarmHour -= 1;
                    alarmMin += 60;
                    if(alarmHour < 0){
                        alarmHour = 23;
                    }
                }

                //Set Global Variable to set calendar to set Alarm time
                AlarmHour = alarmHour;
                AlarmMin = alarmMin;



                //Convert int to str for printing
                String sAlarmHour = Integer.toString(alarmHour);
                String sAlarmMin = Integer.toString(alarmMin);
                AlarmTimeHour = sAlarmHour;
                AlarmTimeMin = sAlarmMin;



                Calendar calendar = Calendar.getInstance();

                calendar.set(
                        calendar.get(Calendar.YEAR),
                        calendar.get(Calendar.MONTH),
                        calendar.get(Calendar.DAY_OF_MONTH),
                        AlarmHour,
                        AlarmMin,
                        0);

                alarmCalendar = calendar;

                setAlarm(alarmCalendar.getTimeInMillis());

            } catch (Exception e) {
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(String strFromDoInBg) {

            if(DistanceResult == null || DurationResult == null){
                Toast ResultErrorHandle = Toast.makeText(getApplicationContext(), "We could not find any results! Sorry!", Toast.LENGTH_SHORT);
                ResultErrorHandle.show();
            }

            ProgressBar spinner;
            spinner = (ProgressBar) findViewById(R.id.progressBar1);
            spinner.setVisibility(View.INVISIBLE);

            TextView Distance_Output = (TextView) findViewById(R.id.DistanceResult);
            Distance_Output.setText("Distance: " + DistanceResult);

            TextView Duration_Output = (TextView) findViewById(R.id.DurationResult);
            Duration_Output.setText("Duration: " + DurationResult);

            TextView LeaveBy_Calculated = (TextView) findViewById(R.id.LeaveBy);
            LeaveBy_Calculated.setText("Leave By| Hour: " + LeaveByHour + "  Min: " + LeaveByMin);

           TextView AlarmTime_Calculated = (TextView) findViewById(R.id.AlarmTime);
            AlarmTime_Calculated.setText("Alarm Time| Hour " + AlarmTimeHour + "  Min: " + AlarmTimeMin);
        }
    }

    public void CancelAlarmCommand(){
        cancelAlarm();
    }

    public void setAlarm(long timeInMillis) {

        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);


        Intent intent = new Intent(this, AlarmReceiver.class);

        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,intent,0);

        AlarmManager.AlarmClockInfo ac= new AlarmManager.AlarmClockInfo(timeInMillis, pendingIntent.getBroadcast(this,0,intent,0));

        alarmManager.setAlarmClock(ac,pendingIntent);

        Toast.makeText(this, "Alarm set!", Toast.LENGTH_SHORT).show();
    }

    private void cancelAlarm(){

        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);


        Intent intent = new Intent(this, AlarmReceiver.class);

        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,intent,0);

        alarmManager.cancel(pendingIntent);

        }
    }

Gradle应用

     apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion '27.0.3'
    defaultConfig {
        applicationId "com.example.mobileassignment2.buildingblocks"
        minSdkVersion 21
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    //noinspection GradleCompatible
    implementation 'com.android.support:appcompat-v7:25.3.1'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'

    implementation 'com.google.android.gms:play-services-places:15.0.1'
    implementation 'com.google.android.gms:play-services-location:15.0.1'

}

Android清单

<?xml version="1.0" encoding="utf-8"?>

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />



<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>

    </activity>
    <receiver
        android:name=".AlarmReceiver"
        android:enabled="true"
        android:exported="true" />
    <meta-data
        android:name="com.google.android.geo.API_KEY"
        android:value="AIzaSyC0UU_6yNvnroXuHBWPd2_SPfBP9Y29bp4"/>

</application>

logcat

09-05 00：04：22.519 1530-9975 /？ I / AudioFlinger：AudioFlinger的线程0xe57037c0 tid = 9975准备运行09-05 00：04：22.546 1530-1603 /？ E / AudioFlinger：内存不足，无法容纳AudioTrack大小= 131296 09-05 00：04：22.548 1530-1603 /？ E / AudioFlinger：createRecordTrack_l（） initCheck失败-12;没有控制块？ 09-05 00：04：22.554 2336-9720 / com.google.android.googlequicksearchbox：search E / AudioRecord：AudioFlinger无法创建记录轨道，状态：-12 09-05 00：04：22.575 2336-9720 / com.google.android.googlequicksearchbox：search E / AudioRecord-JNI：创建AudioRecord实例时出错：初始化检查失败，状态为-12。 09-05 00：04：22.578 2336-9720 / com.google.android.googlequicksearchbox：search E / android.media.AudioRecord：初始化本机时错误代码-20 AudioRecord对象。

android-应用在搜索时不断崩溃

0 个答案: