MapActivity與StrictMode不工作 - 幫助

Question

在Android開發者博客閱讀Tim Bray's post "New Gingerbread API: StrictMode"後，我決定開始使用它在我的項目。我希望在出現問題之前幫助解決性能問題。

我的問題是，每次我試圖加載我MapActivity應用死亡，但啓用StrictMode只有當。即使是一個簡單的，沒有代碼活動，它也會死亡。

有沒有人成功地使用StrictMode與MapActivity？如果是這樣，有什麼竅門？

從logcat的輸出是：

TestActivity - onCreate 
TestActivity - onStart 
TestActivity - onResume 
Handling network change notification:CONNECTED 
Couldn't get connection factory client 
StrictMode policy violation; ~duration=344 ms: android.os.StrictMode$StrictModeDiskReadViolation: policy=343 violation=2 
    at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:745) 
    at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1345) 
    at android.database.sqlite.SQLiteQueryBuilder.query(SQLiteQueryBuilder.java:330) 
    at android.database.sqlite.SQLiteQueryBuilder.query(SQLiteQueryBuilder.java:280) 
    at com.google.android.gsf.settings.GoogleSettingsProvider.query(GoogleSettingsProvider.java:142) 
    at android.content.ContentProvider$Transport.bulkQuery(ContentProvider.java:174) 
    at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:111) 
    at android.os.Binder.execTransact(Binder.java:320) 
    at dalvik.system.NativeStart.run(Native Method) 
# via Binder call with stack: 
android.os.StrictMode$LogStackTrace 
    at android.os.StrictMode.readAndHandleBinderCallViolations(StrictMode.java:1059) 
    at android.os.Parcel.readExceptionCode(Parcel.java:1304) 
    at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:111) 
    at android.content.ContentProviderProxy.bulkQueryInternal(ContentProviderNative.java:330) 
    at android.content.ContentProviderProxy.query(ContentProviderNative.java:366) 
    at android.content.ContentResolver.query(ContentResolver.java:262) 
    at android_maps_conflict_avoidance.com.google.common.android.AndroidConfig.getSetting(AndroidConfig.java:216) 
    at android_maps_conflict_avoidance.com.google.common.android.AndroidConfig.getDistributionChannelInternal(AndroidConfig.java:195) 
    at android_maps_conflict_avoidance.com.google.common.Config.init(Config.java:273) 
    at android_maps_conflict_avoidance.com.google.common.android.AndroidConfig.<init>(AndroidConfig.java:100) 
    at android_maps_conflict_avoidance.com.google.common.android.AndroidConfig.<init>(AndroidConfig.java:87) 
    at com.google.android.maps.MapActivity.onCreate(MapActivity.java:419) 
    at com.company.project.UI.TestActivity.onCreate(TestActivity.java:15) 
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 
    at android.app.ActivityThread.startActivityNow(ActivityThread.java:1487) 
    at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127) 
    at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339) 
    at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:654) 
    at android.widget.TabHost.setCurrentTab(TabHost.java:326) 
    at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:132) 
    at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:456) 
    at android.view.View.performClick(View.java:2485) 
    at android.view.View$PerformClick.run(View.java:9080) 
    at android.os.Handler.handleCallback(Handler.java:587) 
    at android.os.Handler.dispatchMessage(Handler.java:92) 
    at android.os.Looper.loop(Looper.java:130) 
    at android.app.ActivityThread.main(ActivityThread.java:3683) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:507) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
    at dalvik.system.NativeStart.main(Native Method) 
StrictMode policy violation with POLICY_DEATH; shutting down. 
Sending signal. PID: 1254 SIG: 9 
Process com.company.project (pid 1254) has died. 
channel '4073e288 com.company.project/com.company.project.UI.MainActivity (server)' ~ Consumer closed input channel or an error occurred. events=0x8 
channel '4073e288 com.company.project/com.company.project.UI.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed! 
WIN DEATH: Window{4073e288 com.company.project/com.company.project.UI.MainActivity paused=false} 

活動代碼是：（我知道有多餘的東西，但我想看看有什麼標準方法執行）

public class TestActivity extends MapActivity { 

    private final static String TAG = "TestActivity"; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 

     Log.d(TAG, "TestActivity - onCreate"); 
    } 

    @Override 
    protected void onStart() { 
     // TODO Auto-generated method stub 
     super.onStart(); 

     Log.d(TAG, "TestActivity - onStart"); 
    } 

    @Override 
    protected void onResume() { 
     // TODO Auto-generated method stub 
     super.onResume(); 

     Log.d(TAG, "TestActivity - onResume"); 
    } 

    @Override 
    protected void onPause() { 
     // TODO Auto-generated method stub 
     super.onPause(); 

     Log.d(TAG, "TestActivity - onPause"); 
    } 

    @Override 
    protected void onStop() { 
     // TODO Auto-generated method stub 
     super.onStop(); 

     Log.d(TAG, "TestActivity - onStop"); 
    } 

    @Override 
    protected void onRestart() { 
     // TODO Auto-generated method stub 
     super.onRestart(); 

     Log.d(TAG, "TestActivity - onRestart"); 
    } 

    @Override 
    protected void onDestroy() { 
     // TODO Auto-generated method stub 
     super.onDestroy(); 

     Log.d(TAG, "TestActivity - onDestroy"); 
    } 

    @Override 
    protected boolean isRouteDisplayed() { 
     // TODO Auto-generated method stub 

     Log.d(TAG, "TestActivity - isRouteDisplayed"); 

     return false; 
    } 

} 

佈局是：

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

    <com.google.android.maps.MapView 
     android:id="@+id/campusMap" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:clickable="true" 
     android:apiKey="<key>" /> 

</LinearLayout> 

Answer 1

你很好，AFAIK。據我所知，MapView和MapActivity在2008年左右被寫回，並且從那時起沒有經過實質性修改。我不覺得有一些不好的做法，例如主應用程序線程上的I/O。