Question

每当我尝试在手机上测试我的应用时，应用会快速打开，显示白屏然后立即关闭。然后会显示一条提示“不幸的是，该应用程序已停止。”

我已经检查了构建路径，我确保添加了Google Play服务库。我已经尝试了几个已经解决过如何修复的线程，但没有一个正在工作。所以我把这篇文章作为最后的手段让别人手动检查。

这是我的代码：

package com.example.vendsale;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.IntentSender;
import android.database.Cursor;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesClient;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.location.LocationClient;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.CircleOptions;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

public class MainActivity extends FragmentActivity implements
        GooglePlayServicesClient.ConnectionCallbacks,
        GooglePlayServicesClient.OnConnectionFailedListener

{
    private static final int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;
    LocationClient mNewLocationClient;
    private GoogleMap map;
    private LatLng userLocation;
    private DatabaseConnector dbConnector;

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

        dbConnector = new DatabaseConnector(getApplicationContext());
        map = ((MapFragment) getFragmentManager()
                .findFragmentById(R.id.map)).getMap();
        map.setMapType(GoogleMap.MAP_TYPE_NORMAL);
        map.getUiSettings();
        map.setMyLocationEnabled(true);

        mNewLocationClient = new LocationClient(this, this, this);

    }

    protected void onStart() {
        super.onStart();

        mNewLocationClient.connect();

        userLocation = new LatLng(mNewLocationClient.getLastLocation()
                .getLatitude(), mNewLocationClient.getLastLocation()
                .getLongitude());
        CameraUpdate update = CameraUpdateFactory.newLatLng(userLocation);
        map.animateCamera(update);

    }

清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.vendsale"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="11"
        android:targetSdkVersion="17" />

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

    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true" />

    <uses-permission
        android:name="com.example.vendsale.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" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.vendsale.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

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

</manifest>

活动主要：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    style="@style/AppBaseTheme"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="left"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/editText1"
        android:layout_alignBottom="@+id/editText1"
        android:layout_alignRight="@+id/map"
        android:onClick="onClick_Search"
        android:text="@string/ButtonText"
        android:typeface="normal" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:gravity="left"
        android:hint="@string/message"
        android:inputType="text"
        android:typeface="normal"
        android:layout_toLeftOf="@id/button1" />

    <fragment
        android:id="@+id/map"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        class="com.google.android.gms.maps.SupportMapFragment"
        android:layout_below="@id/editText1"
        />



</RelativeLayout>

Answer 1

您已在xml中使用了supportmapfragment类。

添加此导入导入com.google.android.gms.maps.SupportMapFragment;

并将地图初始化行更改为：

map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                    .getMap();

我假设您的代码中的mNewLocationClient部分正常工作，并且那里没有nullpoin。

应用程序使用Android谷歌地图v2崩溃启动

1 个答案: