我正在做一个显示地图的示例我已经使用下面的代码但地图没有显示，显示白屏应用程序关闭警报不幸yourapp关闭。我在编码中做了什么错误请指导我解决这个问题
mainactivity.java
package com.example.mapsample;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import android.support.v7.app.ActionBarActivity;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;
import com.google.android.gms.maps.MapFragment;
public class MainActivity extends ActionBarActivity {
// Google Map
private GoogleMap googleMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
// Loading map
initilizeMap();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* function to load map. If map is not created it will create it for you
* */
@SuppressLint("NewApi") private void initilizeMap() {
if (googleMap == null) {
/* googleMap = ((MapFragment) getFragmentManager().findFragmentById(
R.id.map)).getMap()*/;
googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(android.R.id.content)).getMap();
// check if map is created successfully or not
if (googleMap == null) {
Toast.makeText(getApplicationContext(),
"Sorry! unable to create maps", Toast.LENGTH_SHORT)
.show();
}
}
}
@Override
protected void onResume() {
super.onResume();
initilizeMap();
}
}
activity_main.xml中
<?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" >
<fragment
android:id="@+id/map"
class="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
的manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mapsample"
android:versionCode="1"
android:versionName="1.0" >
<!-- Goolge Maps API Key -->
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<permission
android:name="com.example.mapsample.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.example.mapsample.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!-- Required to show current location -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- Required OpenGL ES 2.0. for Maps V2 -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".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_appkey" />
</application>
日志文件
10-09 15:09:47.669: I/dalvikvm(364): Could not find method android.view.ViewGroup.onNestedScrollAccepted, referenced from method android.support.v7.internal.widget.ActionBarOverlayLayout.onNestedScrollAccepted
10-09 15:09:47.669: W/dalvikvm(364): VFY: unable to resolve virtual method 11746: Landroid/view/ViewGroup;.onNestedScrollAccepted (Landroid/view/View;Landroid/view/View;I)V
10-09 15:09:47.669: D/dalvikvm(364): VFY: replacing opcode 0x6f at 0x0000
10-09 15:09:47.679: D/dalvikvm(364): VFY: dead code 0x0003-0015 in Landroid/support/v7/internal/widget/ActionBarOverlayLayout;.onNestedScrollAccept ed (Landroid/view/View;Landroid/view/View;I)V
10-09 15:09:47.679: I/dalvikvm(364): Could not find method android.view.ViewGroup.onStopNestedScroll, referenced from method android.support.v7.internal.widget.ActionBarOverlayLayout.onStopNestedScroll
10-09 15:09:47.679: W/dalvikvm(364): VFY: unable to resolve virtual method 11752: Landroid/view/ViewGroup;.onStopNestedScroll (Landroid/view/View;)V
10-09 15:09:47.679: D/dalvikvm(364): VFY: replacing opcode 0x6f at 0x0000
10-09 15:09:47.689: D/dalvikvm(364): VFY: dead code 0x0003-0025 in Landroid/support/v7/internal/widget/ActionBarOverlayLayout;.onStopNestedScroll (Landroid/view/View;)V
10-09 15:09:47.689: I/dalvikvm(364): Could not find method android.view.ViewGroup.onWindowSystemUiVisibilityChanged, referenced from method android.support.v7.internal.widget.ActionBarOverlayLayout.onWindowSystemUiVisibi lityChanged
10-09 15:09:47.689: W/dalvikvm(364): VFY: unable to resolve virtual method 11754: Landroid/view/ViewGroup;.onWindowSystemUiVisibilityChanged (I)V
10-09 15:09:47.689: D/dalvikvm(364): VFY: replacing opcode 0x6f at 0x0008
10-09 15:09:47.709: I/dalvikvm(364): Could not find method android.support.v7.internal.widget.ActionBarOverlayLayout.stopNestedScroll, referenced from method android.support.v7.internal.widget.ActionBarOverlayLayout.setHideOnContentScroll Enabled
10-09 15:09:47.709: W/dalvikvm(364): VFY: unable to resolve virtual method 9397: Landroid/support/v7/internal/widget/ActionBarOverlayLayout;.stopNestedScroll ()V
10-09 15:09:47.709: D/dalvikvm(364): VFY: replacing opcode 0x6e at 0x000e
10-09 15:09:47.739: I/dalvikvm(364): Could not find method android.widget.FrameLayout.jumpDrawablesToCurrentState, referenced from method android.support.v7.internal.widget.ActionBarContainer.jumpDrawablesToCurrentStat e
10-09 15:09:47.739: W/dalvikvm(364): VFY: unable to resolve virtual method 12176: Landroid/widget/FrameLayout;.jumpDrawablesToCurrentState ()V
10-09 15:09:47.739: D/dalvikvm(364): VFY: replacing opcode 0x6f at 0x0006
10-09 15:09:47.739: D/dalvikvm(364): VFY: dead code 0x0009-0023 in Landroid/support/v7/internal/widget/ActionBarContainer;.jumpDrawablesToCurrentSt ate ()V
10-09 15:09:47.759: W/dalvikvm(364): VFY: unable to find class referenced in signature (Landroid/view/ActionMode;)
10-09 15:09:47.849: I/dalvikvm(364): Could not find method android.view.ViewGroup.onRtlPropertiesChanged, referenced from method android.support.v7.widget.Toolbar.onRtlPropertiesChanged
10-09 15:09:47.849: W/dalvikvm(364): VFY: unable to resolve virtual method 11749: Landroid/view/ViewGroup;.onRtlPropertiesChanged (I)V
10-09 15:09:47.859: D/dalvikvm(364): VFY: replacing opcode 0x6f at 0x0007
10-09 15:09:47.879: I/dalvikvm(364): Could not find method android.content.res.TypedArray.getChangingConfigurations, referenced from method android.support.v7.internal.widget.TintTypedArray.getChangingConfigurations
10-09 15:09:47.879: W/dalvikvm(364): VFY: unable to resolve virtual method 535: Landroid/content/res/TypedArray;.getChangingConfigurations ()I
10-09 15:09:47.879: D/dalvikvm(364): VFY: replacing opcode 0x6e at 0x0002
10-09 15:09:47.889: D/dalvikvm(364): VFY: dead code 0x0005-0006 in Landroid/support/v7/internal/widget/TintTypedArray;.getChangingConfigurations ()I
10-09 15:09:47.889: I/dalvikvm(364): Could not find method android.content.res.TypedArray.getType, referenced from method android.support.v7.internal.widget.TintTypedArray.getType
10-09 15:09:47.889: W/dalvikvm(364): VFY: unable to resolve virtual method 557: Landroid/content/res/TypedArray;.getType (I)I
10-09 15:09:47.899: D/dalvikvm(364): VFY: replacing opcode 0x6e at 0x0002
10-09 15:09:47.899: D/dalvikvm(364): VFY: dead code 0x0005-0006 in Landroid/support/v7/internal/widget/TintTypedArray;.getType (I)I
10-09 15:09:47.969: I/dalvikvm(364): Could not find method android.view.accessibility.AccessibilityEvent.setSource, referenced from method android.support.v7.internal.widget.ActionBarContextView.onInitializeAccessibilit yEvent
10-09 15:09:47.969: W/dalvikvm(364): VFY: unable to resolve virtual method 11859: Landroid/view/accessibility/AccessibilityEvent;.setSource (Landroid/view/View;)V
10-09 15:09:47.969: D/dalvikvm(364): VFY: replacing opcode 0x6e at 0x000e
10-09 15:09:47.979: I/dalvikvm(364): Could not find method android.support.v7.internal.widget.AbsActionBarView.onInitializeAccessibilityEve nt, referenced from method android.support.v7.internal.widget.ActionBarContextView.onInitializeAccessibilit yEvent
10-09 15:09:47.979: W/dalvikvm(364): VFY: unable to resolve virtual method 9095: Landroid/support/v7/internal/widget/AbsActionBarView;.onInitializeAccessibilityE vent (Landroid/view/accessibility/AccessibilityEvent;)V
10-09 15:09:47.979: D/dalvikvm(364): VFY: replacing opcode 0x6f at 0x002d
10-09 15:09:47.979: D/dalvikvm(364): VFY: dead code 0x0011-002b in Landroid/support/v7/internal/widget/ActionBarContextView;.onInitializeAccessibil ityEvent (Landroid/view/accessibility/AccessibilityEvent;)V
10-09 15:09:47.979: D/dalvikvm(364): VFY: dead code 0x0030-0030 in Landroid/support/v7/internal/widget/ActionBarContextView;.onInitializeAccessibil ityEvent (Landroid/view/accessibility/AccessibilityEvent;)V
10-09 15:09:48.089: I/dalvikvm(364): Could not find method android.app.AlertDialog$Builder.<init>, referenced from method com.google.android.gms.common.GooglePlayServicesUtil.a
10-09 15:09:48.089: W/dalvikvm(364): VFY: unable to resolve direct method 91: Landroid/app/AlertDialog$Builder;.<init> (Landroid/content/Context;I)V
-09 15:09:48.089: D/dalvikvm(364): VFY: replacing opcode 0x70 at 0x0037
10-09 15:09:48.099: E/dalvikvm(364): Could not find class 'android.app.Notification$Builder', referenced from method com.google.android.gms.common.GooglePlayServicesUtil.a
10-09 15:09:48.099: W/dalvikvm(364): VFY: unable to resolve new-instance 41 (Landroid/app/Notification$Builder;) in Lcom/google/android/gms/common/GooglePlayServicesUtil;
10-09 15:09:48.099: D/dalvikvm(364): VFY: replacing opcode 0x22 at 0x0029
10-09 15:09:48.110: D/dalvikvm(364): VFY: dead code 0x002b-0071 in Lcom/google/android/gms/common/GooglePlayServicesUtil;.a (ILandroid/content/Context;)V
10-09 15:09:48.119: D/dalvikvm(364): DexOpt: couldn't find field Landroid/content/res/Configuration;.smallestScreenWidthDp
10-09 15:09:48.119: W/dalvikvm(364): VFY: unable to resolve instance field 65
10-09 15:09:48.119: D/dalvikvm(364): VFY: replacing opcode 0x52 at 0x0012
10-09 15:09:48.119: D/dalvikvm(364): VFY: dead code 0x0014-0018 in Lcom/google/android/gms/common/GooglePlayServicesUtil;.b (Landroid/content/res/Resources;)Z
10-09 15:09:48.149: I/dalvikvm(364): Could not find method android.app.Activity.getFragmentManager, referenced from method com.google.android.gms.common.GooglePlayServicesUtil.showErrorDialogFragment
10-09 15:09:48.149: W/dalvikvm(364): VFY: unable to resolve virtual method 32: Landroid/app/Activity;.getFragmentManager ()Landroid/app/FragmentManager;
10-09 15:09:48.149: D/dalvikvm(364): VFY: replacing opcode 0x6e at 0x0023
10-09 15:09:48.159: D/dalvikvm(364): VFY: dead code 0x0026-0030 in Lcom/google/android/gms/common/GooglePlayServicesUtil;.showErrorDialogFragment (ILandroid/app/Activity;Landroid/support/v4/app/Fragment;ILandroid/content/Dialo gInterface$OnCancelListener;)Z
10-09 15:09:48.180: D/AndroidRuntime(364): Shutting down VM
10-09 15:09:48.180: W/dalvikvm(364): threadid=1: thread exiting with uncaught exception (group=0x40015560)
10-09 15:09:48.209: E/AndroidRuntime(364): FATAL EXCEPTION: main
10-09 15:09:48.209: E/AndroidRuntime(364): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mapsample/com.example.mapsample.MainActivity}: android.view.InflateException: Binary XML file line #6: Error inflating class fragment
10-09 15:09:48.209: E/AndroidRuntime(364): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.os.Handler.dispatchMessage(Handler.java:99)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.os.Looper.loop(Looper.java:123)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.app.ActivityThread.main(ActivityThread.java:3683)
10-09 15:09:48.209: E/AndroidRuntime(364): at java.lang.reflect.Method.invokeNative(Native Method)
10-09 15:09:48.209: E/AndroidRuntime(364): at java.lang.reflect.Method.invoke(Method.java:507)
10-09 15:09:48.209: E/AndroidRuntime(364): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-09 15:09:48.209: E/AndroidRuntime(364): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-09 15:09:48.209: E/AndroidRuntime(364): at dalvik.system.NativeStart.main(Native Method)
10-09 15:09:48.209: E/AndroidRuntime(364): Caused by: android.view.InflateException: Binary XML file line #6: Error inflating class fragment
10-09 15:09:48.209: E/AndroidRuntime(364): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:587)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(ActionBarAct ivityDelegateBase.java:228)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:1 02)
10-09 15:09:48.209: E/AndroidRuntime(364): at com.example.mapsample.MainActivity.onCreate(MainActivity.java:22)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
10-09 15:09:48.209: E/AndroidRuntime(364): ... 11 more
10-09 15:09:48.209: E/AndroidRuntime(364): Caused by: java.lang.IllegalStateException: The meta-data tag in your app's AndroidManifest.xml does not have the right value. Expected 6587000 but found 0. You must have the following declaration within the <application> element: <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />
10-09 15:09:48.209: E/AndroidRuntime(364): at com.google.android.gms.common.GooglePlayServicesUtil.D(Unknown Source)
10-09 15:09:48.209: E/AndroidRuntime(364): at com.google.android.gms.common.GooglePlayServicesUtil.isGooglePlayServicesAvailab le(Unknown Source)
10-09 15:09:48.209: E/AndroidRuntime(364): at com.google.android.gms.maps.internal.x.T(Unknown Source)
10-09 15:09:48.209: E/AndroidRuntime(364): at com.google.android.gms.maps.internal.x.S(Unknown Source)
10-09 15:09:48.209: E/AndroidRuntime(364): at com.google.android.gms.maps.MapsInitializer.initialize(Unknown Source)
10-09 15:09:48.209: E/AndroidRuntime(364): at com.google.android.gms.maps.SupportMapFragment$b.nO(Unknown Source)
10-09 15:09:48.209: E/AndroidRuntime(364): at com.google.android.gms.maps.SupportMapFragment$b.a(Unknown Source)
10-09 15:09:48.209: E/AndroidRuntime(364): at com.google.android.gms.dynamic.a.a(Unknown Source)
10-09 15:09:48.209: E/AndroidRuntime(364): at com.google.android.gms.dynamic.a.onInflate(Unknown Source)
10-09 15:09:48.209: E/AndroidRuntime(364): at com.google.android.gms.maps.SupportMapFragment.onInflate(Unknown Source)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:215 8)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:297)
10-09 15:09:48.209: E/AndroidRuntime(364): at android.support.v7.app.ActionBarActivity.onCreateView(ActionBarActivity.java:547 )
10-09 15:09:48.209: E/AndroidRuntime(364): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
10-09 15:09:48.209: E/AndroidRuntime(364): ... 20 more
10-09 15:09:50.480: I/Process(364): Sen
答案 0 :(得分：0)
可能会发生这种情况，因为现在地图尚未就绪。尝试致电mapFragment.getMapAsync(OnMapReadyCallback)，然后查看onMapReady(GoogleMap googleMap)
答案 1 :(得分：0)
首先，您必须在AndroidManifest文件的元素中包含以下声明：
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" >
</meta-data>
您的Activity类必须如下所示：
public class MapActivity extends Activity implements OnMapReadyCallback {
private GoogleMap googleMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SupportMapFragment mapFragment = getSupportFragmentManager().findFragmentById(android.R.id.content);
mapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
this.googleMap = googleMap;
Toast.makeText(getApplicationContext(), "Map is ready!", Toast.LENGTH_SHORT).show();
}
}