百度地图开发的时候遇到的问题（一）

使用百度地图SDK，运行Demo还可以的，但是当用到自己的程序中就出现问题了：

报出异常如下：

07-27 10:31:59.501: E/AndroidRuntime(8282): FATAL EXCEPTION: main
07-27 10:31:59.501: E/AndroidRuntime(8282): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.Casper.UI/com.Casper.subUI.Trans_Location}: android.view.InflateException: Binary XML file line #6: Error inflating class com.baidu.mapapi.map.MapView
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2306)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2358)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.app.ActivityThread.access$600(ActivityThread.java:156)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1340)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.os.Handler.dispatchMessage(Handler.java:99)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.os.Looper.loop(Looper.java:153)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.app.ActivityThread.main(ActivityThread.java:5297)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at java.lang.reflect.Method.invokeNative(Native Method)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at java.lang.reflect.Method.invoke(Method.java:511)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at dalvik.system.NativeStart.main(Native Method)
07-27 10:31:59.501: E/AndroidRuntime(8282): Caused by: android.view.InflateException: Binary XML file line #6: Error inflating class com.baidu.mapapi.map.MapView
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.view.LayoutInflater.createView(LayoutInflater.java:613)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:274)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.app.Activity.setContentView(Activity.java:1881)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at com.Casper.subUI.Trans_Location.onCreate(Trans_Location.java:51)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.app.Activity.performCreate(Activity.java:5122)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1081)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2270)
07-27 10:31:59.501: E/AndroidRuntime(8282):     ... 11 more
07-27 10:31:59.501: E/AndroidRuntime(8282): Caused by: java.lang.reflect.InvocationTargetException
07-27 10:31:59.501: E/AndroidRuntime(8282):     at java.lang.reflect.Constructor.constructNative(Native Method)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at android.view.LayoutInflater.createView(LayoutInflater.java:587)
07-27 10:31:59.501: E/AndroidRuntime(8282):     ... 22 more
07-27 10:31:59.501: E/AndroidRuntime(8282): Caused by: java.lang.IllegalStateException: you have not supplyed the global app context info from SDKInitializer.initialize(Context) function.
07-27 10:31:59.501: E/AndroidRuntime(8282):     at com.baidu.mapapi.a.b(Unknown Source)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at com.baidu.mapapi.map.MapView.a(Unknown Source)
07-27 10:31:59.501: E/AndroidRuntime(8282):     at com.baidu.mapapi.map.MapView.<init>(Unknown Source)
07-27 10:31:59.501: E/AndroidRuntime(8282):     ... 25 more

在网上查了一天的，没办法解决。

网上出现这样错误的原因有很多：

一、没有把百度的.jar包导进来，因为使用的百度地图是第三方的，需要把它写到一个自己创建的libs文件夹下,还有把里面的.os文件也放到下面。

二、在继承FragmentActivity的要使用android.support.v4.app.FragmentActivity;而不是使用android.app.FragmentActivity.

三、因为没有编译成功的原理，有时候需要将工程clean一下

四、没有将申请百度地图key放到Manifest.xml文件中，那样根本不可能使用的。

但是我的错误都不是上面的问题，在百度地图Demo中有一个Application的类，那是一个配置整个application的类，使用的时候一定要定义这个类，同时还要把这个类放到Manifest.xml文件中说明一下：

<application
        android:name="com.Casper.ApplicationConfig.ApplicationConfig"
        android:debuggable="true"
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"