应用程序在其他设备上崩溃，但在我的设备上完美运行

Question

我制作了一个Android应用程序，可以找到atm，银行在您当前的位置或自定义位置。但是当我点击按钮时，应用程序会在不在我设备上的其他设备上崩溃

这是我的logcat

FATAL EXCEPTION: main
                                                                                                     Process: com.example.udaygarg.locationplacedetailsv2, PID: 27580java.lang.NullPointerException
    at com.example.udaygarg.locationplacedetailsv2.StartActivity.onClick(StartActivity.java:158)
                                                                                                         at android.view.View.performClick(View.java:4438)
                                                                                                         at android.view.View$PerformClick.run(View.java:18439)
                                                                                                         at android.os.Handler.handleCallback(Handler.java:733)
                                                                                                         at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                                                         at android.os.Looper.loop(Looper.java:136)
                                                                                                         at android.app.ActivityThread.main(ActivityThread.java:5146)
                                                                                                         at java.lang.reflect.Method.invokeNative(Native Method)
                                                                                                         at java.lang.reflect.Method.invoke(Method.java:515)
                                                                                                         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
                                                                                                         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612)
                                                                                                         at dalvik.system.NativeStart.main(Native Method)

这是布局文件activity_start.xml

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >



        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="ATM"
            android:id="@+id/button"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:textSize="15dp"
            android:layout_centerVertical="true"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:layout_alignRight="@+id/button4"
            android:layout_alignEnd="@+id/button4" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Airport"
            android:id="@+id/button2"
            android:layout_alignTop="@+id/button"
            android:layout_centerHorizontal="true"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:textSize="15dp" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Bank"
            android:id="@+id/button3"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:layout_alignTop="@+id/button2"
            android:layout_alignParentRight="true"
            android:layout_alignParentEnd="true"
            android:layout_alignLeft="@+id/button6"
            android:layout_alignStart="@+id/button6"
            android:textSize="15dp" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"

            android:text="Bus Station"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:id="@+id/button4"
            android:layout_below="@+id/button"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:textSize="15dp" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Doctor"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:id="@+id/button5"
            android:layout_alignBottom="@+id/button4"
            android:layout_alignRight="@+id/button2"
            android:layout_alignEnd="@+id/button2"
            android:textSize="15dp" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Hospital"
            android:id="@+id/button6"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:layout_alignParentRight="true"
            android:layout_alignParentEnd="true"
            android:layout_alignTop="@+id/button5"
            android:textSize="15dp" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Find new location"
            android:id="@+id/button8"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:layout_below="@+id/editText"
            android:layout_toRightOf="@+id/button2"
            android:layout_toEndOf="@+id/button2"
            android:layout_marginTop="54dp" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Church"
            android:id="@+id/button9"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:layout_below="@+id/button4"
            android:layout_alignRight="@+id/button4"
            android:layout_alignEnd="@+id/button4"
            android:textSize="15dp" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Gym"
            android:id="@+id/button10"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:layout_below="@+id/button4"
            android:layout_alignLeft="@+id/button5"
            android:layout_alignStart="@+id/button5"
            android:layout_alignRight="@+id/button5"
            android:layout_alignEnd="@+id/button5"
            android:layout_alignBottom="@+id/button9"
            android:textSize="15dp" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="School"
            android:id="@+id/button12"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:layout_below="@+id/button9"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:layout_alignRight="@+id/button9"
            android:layout_alignEnd="@+id/button9"
            android:textSize="15dp" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Park"
            android:id="@+id/button13"
            android:layout_alignTop="@+id/button12"
            android:layout_alignLeft="@+id/button10"
            android:layout_alignStart="@+id/button10"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:layout_alignRight="@+id/button10"
            android:layout_alignEnd="@+id/button10"
            android:layout_alignBottom="@+id/button12"
            android:textSize="15dp" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Bar"
            android:id="@+id/button14"
            android:layout_alignTop="@+id/button13"
            android:layout_alignParentRight="true"
            android:layout_alignParentEnd="true"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:layout_alignBottom="@+id/button13"
            android:layout_alignLeft="@+id/button6"
            android:layout_alignStart="@+id/button6"
            android:textSize="15dp" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Mosque"
            android:id="@+id/button11"
            android:layout_below="@+id/button6"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:layout_alignParentRight="true"
            android:layout_alignParentEnd="true"
            android:textSize="15dp"
            android:layout_toEndOf="@+id/button10"
            android:layout_alignLeft="@+id/button14"
            android:layout_alignStart="@+id/button14" />

        <EditText
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/editText"
            android:hint="Enter prefered radius between 2 - 50 km"
            android:layout_alignParentTop="true"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true" />

        <EditText
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/editText2"
            android:layout_alignBottom="@+id/button8"
            android:layout_toLeftOf="@+id/button8"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:hint="Enter location eg. sector-55,Noida/Delhi"/>

        <Button

            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Set to Current Location"
            android:id="@+id/button7"
            style="@style/Widget.AppCompat.Button.Borderless.Colored"
            android:layout_below="@+id/button8"
            android:layout_alignParentRight="true"
            android:layout_alignParentEnd="true"
            android:layout_toRightOf="@+id/editText2"
            android:layout_toEndOf="@+id/editText2" />

    </RelativeLayout>

manifestfile.xml

    <?xml version="1.0" encoding="utf-8"?>
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
        package="com.example.udaygarg.locationplacedetailsv2">



        <permission
            android:name="com.example.udaygarg.locationplacedetailsv2.permission.MAPS_RECEIVE"
            android:protectionLevel="signature"/>

        <uses-permission android:name="com.example.udaygarg.locationplacedetailsv2.permission.MAPS_RECEIVE"/>
        <uses-permission android:name="android.permission.INTERNET" />
        <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />


        <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
        <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
        <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
        <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
        <uses-feature
            android:glEsVersion="0x00020000"
            android:required="true"/>


        <application
            android:allowBackup="true"
            android:icon="@mipmap/ic_launcher"
            android:label="@string/app_name1"
            android:supportsRtl="true"
            android:theme="@style/AppTheme">
            <activity android:name=".Splashscreen">
                <intent-filter>
                    <action android:name="android.intent.action.MAIN" />

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

            </activity>
            <activity android:name=".StartActivity">

                <intent-filter>
                    <action android:name="android.intent.action.MAIN" />

                    <category android:name="android.intent.category.DEFAULT" />
                </intent-filter>
            </activity>
            <activity android:name=".MainActivity">
                <intent-filter>
                    <action android:name="android.intent.action.MAIN" />
                    <category android:name="android.intent.category.DEFAULT" />
                </intent-filter>
            </activity>
            <activity
                android:name=".PlaceDetailsActivity">
                <intent-filter>
                    <action android:name=".PlaceDetails" />
                    <category android:name="android.intent.category.DEFAULT" />
                </intent-filter>
            </activity>
            <meta-data
                android:name="com.google.android.gms.version"
                android:value="@integer/google_play_services_version" />



            <meta-data
                android:name="com.google.android.maps.v2.API_KEY"
                android:value="AIzaSyBcL4XaHzcJCslvOq5Q9jfT2XIXf3TmVIo"/>
        </application>
    </manifest>

StartActivity.java

package com.example.udaygarg.locationplacedetailsv2;


import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import java.io.IOException;
import java.util.List;

public class StartActivity extends Activity implements View.OnClickListener, LocationListener {

    Button bt1, bt2, bt3, bt4, bt5, bt6, bt7, bt8, bt9, bt10, bt11, bt12, bt13, bt14;
    ConnectionDetector cd;
    Boolean isInternetPresent = false;
    int radius = 2;
    EditText et1, et2;
    double latitude, longitude;
    Intent in;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_start);

        bt1 = (Button) findViewById(R.id.button);
        bt1.setOnClickListener(this);

        bt2 = (Button) findViewById(R.id.button2);
        bt2.setOnClickListener(this);

        bt3 = (Button) findViewById(R.id.button3);
        bt3.setOnClickListener(this);

        bt4 = (Button) findViewById(R.id.button4);
        bt4.setOnClickListener(this);

        bt5 = (Button) findViewById(R.id.button5);
        bt5.setOnClickListener(this);

        bt6 = (Button) findViewById(R.id.button6);
        bt6.setOnClickListener(this);

        bt7 = (Button) findViewById(R.id.button9);
        bt7.setOnClickListener(this);

        bt8 = (Button) findViewById(R.id.button10);
        bt8.setOnClickListener(this);

        bt9 = (Button) findViewById(R.id.button11);
        bt9.setOnClickListener(this);

        bt10 = (Button) findViewById(R.id.button12);
        bt10.setOnClickListener(this);

        bt11 = (Button) findViewById(R.id.button13);
        bt11.setOnClickListener(this);

        bt12 = (Button) findViewById(R.id.button14);
        bt12.setOnClickListener(this);

        bt13= (Button) findViewById(R.id.button7);
        bt13.setOnClickListener(this);

        bt14= (Button) findViewById(R.id.button8);
        bt14.setOnClickListener(this);




        et1 = (EditText) findViewById(R.id.editText);
        et2 = (EditText) findViewById(R.id.editText2);


        cd = new ConnectionDetector(getApplicationContext());


    }

    @Override
    public void onClick(View v) {

        if (v.getId() == R.id.button) {


            isInternetPresent = cd.isConnectingToInternet();

            // check for Internet status
            if (isInternetPresent) {
                // Internet Connection is Present
                // make HTTP requests

                sendquerydata("atm", radius, latitude, longitude);

            } else {
                // Internet connection is not present
                // Ask user to connect to Internet
                showAlertDialog(StartActivity.this, "No Internet Connection",
                        "You don't have internet connection. Connect to the internet", false);
            }
        } else if (v.getId() == R.id.button8) {
            isInternetPresent = cd.isConnectingToInternet();
            if (isInternetPresent) {
                Geocoder geocoder = new Geocoder(this);
                String address = et2.getText().toString();
                List<Address> addresses = null;
                try {
                    addresses = geocoder.getFromLocationName(address, 1);
                } catch (IOException e) {
                    e.printStackTrace();
                }

                if (addresses.size() > 0) {
                    latitude = addresses.get(0).getLatitude();
                    longitude = addresses.get(0).getLongitude();
                }
                sendquerydata("", 2, latitude, longitude);
            }
            else{
                showAlertDialog(StartActivity.this, "No Internet Connection",
                        "You don't have internet connection. Connect to the internet", false);
            }


        }
        else if (v.getId() == R.id.button7) {



                LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
                if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                    // TODO: Consider calling
                    //    ActivityCompat#requestPermissions
                    // here to request the missing permissions, and then overriding
                    //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
                    //                                          int[] grantResults)
                    // to handle the case where the user grants the permission. See the documentation
                    // for ActivityCompat#requestPermissions for more details.
                    return;
                }
                Location location;
                location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);

                latitude = location.getLatitude();
                longitude = location.getLongitude();

                sendquerydata("", 2, latitude, longitude);

            }

点击按钮7和8时应用程序崩溃了。请帮忙解决这个问题 ps：我第一次在这里问一个问题

Answer 1

为块按钮7和按钮8编写单独的函数，然后检查权限是否未授予调用requestPermissions，如果用户授予它，则调用您私有写入的函数，如果已经授予权限，则立即运行该函数。请注意，在api 23编写if语句以检查SDK_INT是否高于23之前，您不需要检查权限

Answer 2

将IF置于上面的Try中，也许在Try内部的地址分配不正常，所以你有空地址，这里你得到了异常