我正在制作地图应用。它在SDK 16上为我工作，但问题是我需要在sdk 8上扩展它并且我的应用程序崩溃。这是我对sdk 16 here
的完整代码我将support-library-v4添加为项目的externar JAR。我还添加了google-play-service-lib作为库。但没有任何作用
我将Activity更改为FragmentActivity
并且还使用了
googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
而不是
googleMap = ((MapFragment)getFragmentManager().findFragmentById(R.id.map)).getMap();
我遇到了很多问题，但最终在sdk 16上解决了这个问题。我需要在sdk 8中使用它，但应用程序崩溃并且不起作用。
请帮助我。
这是我的清单：
<permission
android:name="com.ariagostar.maptest.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="8" />
<uses-permission android:name="com.ariagostar.maptest.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:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/mahdi_theme"
android:name=".G"
>
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main"
>
</activity>
<activity android:name=".SplashActivity">
</activity>
<activity android:name=".LocationsActivity"
android:screenOrientation="portrait"
>
</activity>
<activity android:name=".AIDSActivity"
android:screenOrientation="portrait"
></activity>
<activity android:name=".AboutActivity"></activity>
<activity android:name=".CureActivity"
android:screenOrientation="portrait"
></activity>
<activity android:name=".EllatActivity"
android:screenOrientation="portrait"
></activity>
<activity android:name=".InfectedActivity"
android:screenOrientation="portrait"
></activity>
<activity android:name=".QuestionActivity"
android:screenOrientation="portrait"
>
</activity>
<activity android:name=".SeirActivity"
android:screenOrientation="portrait"></activity>
<activity android:name=".PreventionActivity"
android:screenOrientation="portrait"></activity>
<activity android:name=".TashdidActivity"
android:screenOrientation="portrait"></activity>
<activity android:name=".AboutUsActivity"
android:screenOrientation="portrait"></activity>
<activity android:name=".OtherProductActivity"
android:screenOrientation="portrait"></activity>
<activity android:name=".MapActivity"
android:label="@string/title_activity_main">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<uses-library android:name="com.google.android.maps" />
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="my actual key" />
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
</application>
这是我的地图活动：
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
public class MapActivity extends FragmentActivity {
private GoogleMap googleMap;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.map_form);
try {
Log.i("LOG", "map test 1");
// Loading map
initilizeMap();
Log.i("LOG", "map test 2");
} catch (Exception e) {
Log.e("LOG", "I got an error", e);
e.printStackTrace();
}
Button b1 = (Button) findViewById(R.id.button1);
b1.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
double latitude =20.002 ;
double longitude = 3.399;
// create marker
//MarkerOptions marker = new MarkerOptions().position(new LatLng(latitude, longitude)).title("Hello Maps ");
// adding marker
//googleMap.addMarker(marker);
CameraPosition cameraPosition = new CameraPosition.Builder().target(
new LatLng(37.385044, 78.486671)).zoom(12).build();
googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
private void initilizeMap() {
if (googleMap == null) {
//googleMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
//googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
//googleMap = ((MapFragment)getFragmentManager().findFragmentById(R.id.map)).getMap();
googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).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() {
initilizeMap();
super.onResume();
}
}
这是我的map_form
<?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"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="Button" />
</RelativeLayout>
logcat的：
12-13 11:09:51.957: E/LOG(4706): I got an error
12-13 11:09:51.957: E/LOG(4706): java.lang.NullPointerException
12-13 11:09:51.957: E/LOG(4706): at com.ariagostar.hiv.MapActivity.initilizeMap(MapActivity.java:76)
12-13 11:09:51.957: E/LOG(4706): at com.ariagostar.hiv.MapActivity.onCreate(MapActivity.java:32)
12-13 11:09:51.957: E/LOG(4706): at android.app.Activity.performCreate(Activity.java:5372)
12-13 11:09:51.957: E/LOG(4706): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1104)
12-13 11:09:51.957: E/LOG(4706): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2267)
12-13 11:09:51.957: E/LOG(4706): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2359)
12-13 11:09:51.957: E/LOG(4706): at android.app.ActivityThread.access$700(ActivityThread.java:165)
12-13 11:09:51.957: E/LOG(4706): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1326)
12-13 11:09:51.957: E/LOG(4706): at android.os.Handler.dispatchMessage(Handler.java:99)
12-13 11:09:51.957: E/LOG(4706): at android.os.Looper.loop(Looper.java:137)
12-13 11:09:51.957: E/LOG(4706): at android.app.ActivityThread.main(ActivityThread.java:5455)
12-13 11:09:51.957: E/LOG(4706): at java.lang.reflect.Method.invokeNative(Native Method)
12-13 11:09:51.957: E/LOG(4706): at java.lang.reflect.Method.invoke(Method.java:525)
12-13 11:09:51.957: E/LOG(4706): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
12-13 11:09:51.957: E/LOG(4706): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
12-13 11:09:51.957: E/LOG(4706): at dalvik.system.NativeStart.main(Native Method)
12-13 11:09:51.957: E/AndroidRuntime(4706): FATAL EXCEPTION: main
12-13 11:09:51.957: E/AndroidRuntime(4706): java.lang.RuntimeException: Unable to resume activity {com.ariagostar.hiv/com.ariagostar.hiv.MapActivity}: java.lang.NullPointerException
12-13 11:09:51.957: E/AndroidRuntime(4706): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2929)
12-13 11:09:51.957: E/AndroidRuntime(4706): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2958)
12-13 11:09:51.957: E/AndroidRuntime(4706): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2364)
12-13 11:09:51.957: E/AndroidRuntime(4706): at android.app.ActivityThread.access$700(ActivityThread.java:165)
12-13 11:09:51.957: E/AndroidRuntime(4706): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1326)
12-13 11:09:51.957: E/AndroidRuntime(4706): at android.os.Handler.dispatchMessage(Handler.java:99)
12-13 11:09:51.957: E/AndroidRuntime(4706): at android.os.Looper.loop(Looper.java:137)
12-13 11:09:51.957: E/AndroidRuntime(4706): at android.app.ActivityThread.main(ActivityThread.java:5455)
12-13 11:09:51.957: E/AndroidRuntime(4706): at java.lang.reflect.Method.invokeNative(Native Method)
12-13 11:09:51.957: E/AndroidRuntime(4706): at java.lang.reflect.Method.invoke(Method.java:525)
12-13 11:09:51.957: E/AndroidRuntime(4706): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
12-13 11:09:51.957: E/AndroidRuntime(4706): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
12-13 11:09:51.957: E/AndroidRuntime(4706): at dalvik.system.NativeStart.main(Native Method)
12-13 11:09:51.957: E/AndroidRuntime(4706): Caused by: java.lang.NullPointerException
12-13 11:09:51.957: E/AndroidRuntime(4706): at com.ariagostar.hiv.MapActivity.initilizeMap(MapActivity.java:76)
12-13 11:09:51.957: E/AndroidRuntime(4706): at com.ariagostar.hiv.MapActivity.onResume(MapActivity.java:90)
12-13 11:09:51.957: E/AndroidRuntime(4706): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1209)
12-13 11:09:51.957: E/AndroidRuntime(4706): at android.app.Activity.performResume(Activity.java:5450)
12-13 11:09:51.957: E/AndroidRuntime(4706): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2919)
12-13 11:09:51.957: E/AndroidRuntime(4706): ... 12 more
答案 0 :(得分：1)
仅在API级别12之后才支持MapFragment或SupportMapFragment。建议使用SupportMapFragment。
Fragment类在API Level 11之前不可用，并且您的目标是不支持Fragment的API Level 8。这就是为什么我认为你得到如下错误：
Caused by: java.lang.ClassNotFoundException: android.view.fragment in loader dalvik.system.PathClassLoader
答案 1 :(得分：0)
答案 2 :(得分：0)
当您的错误指示INSTALL_FAILED_MISSING_SHARED_LIBRARY and cancels the istalation. in my real device "unfortunately ... has stoped"并且正在使用SupportMapFragment及其在supportv4库中可用时，应该在项目中添加support-library-v4以支持下面的地图片段API12。
更改您的onResume()，如下所示：
@Override
protected void onResume() {
super.onResume();
initilizeMap();
}
答案 3 :(得分：0)
我终于解决了这个问题。这只是因为使用
android:name="com.google.android.gms.maps.MapFragment"
并且应该使用这个：
android:name="com.google.android.gms.maps.SupportMapFragment"
并且应用正常运行