我正在尝试让我的Android应用程序更高效，更快，所以我想让db调用异步（使用asynctask），但我无法弄清楚如何。 以下是我的代码段：
public List<POI> todosPOIs() {
List<POI> POIs = new ArrayList<POI>();
SQLiteDatabase db = getWritableDatabase();
Cursor cursor = db.rawQuery("SELECT * FROM " + NOME_TABELA, null);
if (cursor.moveToFirst()) {
do {
POIs.add(new POI(Integer.parseInt(cursor.getString(0)), cursor.getString(1), cursor.getString(2), cursor.getString(3), cursor.getString(4),cursor.getString(5),cursor.getString(6),cursor.getString(7),cursor.getString(8),cursor.getString(9),cursor.getString(10),cursor.getString(11)));
}
while (cursor.moveToNext());
}
cursor.close();
db.close();
return POIs;
}
编辑：
我已经按照你的说法完成了它的工作，但应用程序仍然很慢。我已启用strictmode所以我可以看到它为什么慢，这是我的logcat。任何虽然?? ??
03-12 09:07:02.385 28028-28028/roteiro.pap.pedro.roteiro D/StrictMode﹕ StrictMode policy violation; ~duration=29 ms: android.os.StrictMode$StrictModeDiskReadViolation: policy=23 violation=2
at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1118)
at android.database.sqlite.SQLiteConnection.applyBlockGuardPolicy(SQLiteConnection.java:1038)
at android.database.sqlite.SQLiteConnection.executeForLong(SQLiteConnection.java:592)
at android.database.sqlite.SQLiteConnection.setPageSize(SQLiteConnection.java:244)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:213)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:972)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:229)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
at roteiro.pap.pedro.roteiro.DBHelper.todosPOIs(DBHelper.java:135)
at roteiro.pap.pedro.roteiro.DBHelper$getData.doInBackground(DBHelper.java:128)
at roteiro.pap.pedro.roteiro.DBHelper.getTodosPOIs(DBHelper.java:115)
at roteiro.pap.pedro.roteiro.Lista.onCreate(Lista.java:60)
at android.app.Activity.performCreate(Activity.java:5122)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2446)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3953)
at android.app.ActivityThread.access$700(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1382)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5434)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:834)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
03-12 09:07:02.385 28028-28028/roteiro.pap.pedro.roteiro D/StrictMode﹕ StrictMode policy violation; ~duration=28 ms: android.os.StrictMode$StrictModeDiskReadViolation: policy=23 violation=2
at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1118)
at android.database.sqlite.SQLiteConnection.applyBlockGuardPolicy(SQLiteConnection.java:1038)
at android.database.sqlite.SQLiteConnection.executeForLong(SQLiteConnection.java:592)
at android.database.sqlite.SQLiteConnection.setForeignKeyModeFromConfiguration(SQLiteConnection.java:274)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:214)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:972)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:229)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
at roteiro.pap.pedro.roteiro.DBHelper.todosPOIs(DBHelper.java:135)
at roteiro.pap.pedro.roteiro.DBHelper$getData.doInBackground(DBHelper.java:128)
at roteiro.pap.pedro.roteiro.DBHelper.getTodosPOIs(DBHelper.java:115)
at roteiro.pap.pedro.roteiro.Lista.onCreate(Lista.java:60)
at android.app.Activity.performCreate(Activity.java:5122)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2446)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3953)
at android.app.ActivityThread.access$700(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1382)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5434)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:834)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
03-12 09:07:02.386 28028-28028/roteiro.pap.pedro.roteiro D/StrictMode﹕ StrictMode policy violation; ~duration=25 ms: android.os.StrictMode$StrictModeDiskReadViolation: policy=23 violation=2
at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1118)
at android.database.sqlite.SQLiteConnection.applyBlockGuardPolicy(SQLiteConnection.java:1038)
at android.database.sqlite.SQLiteConnection.executeForString(SQLiteConnection.java:635)
at android.database.sqlite.SQLiteConnection.setJournalMode(SQLiteConnection.java:313)
at android.database.sqlite.SQLiteConnection.setWalModeFromConfiguration(SQLiteConnection.java:287)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:215)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:972)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:229)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
at roteiro.pap.pedro.roteiro.DBHelper.todosPOIs(DBHelper.java:135)
at roteiro.pap.pedro.roteiro.DBHelper$getData.doInBackground(DBHelper.java:128)
at roteiro.pap.pedro.roteiro.DBHelper.getTodosPOIs(DBHelper.java:115)
at roteiro.pap.pedro.roteiro.Lista.onCreate(Lista.java:60)
at android.app.Activity.performCreate(Activity.java:5122)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2446)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3953)
at android.app.ActivityThread.access$700(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1382)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5434)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:834)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
03-12 09:07:02.386 28028-28028/roteiro.pap.pedro.roteiro D/StrictMode﹕ StrictMode policy violation; ~duration=23 ms: android.os.StrictMode$StrictModeDiskReadViolation: policy=23 violation=2
at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1118)
at android.database.sqlite.SQLiteConnection.applyBlockGuardPolicy(SQLiteConnection.java:1038)
at android.database.sqlite.SQLiteConnection.executeForString(SQLiteConnection.java:635)
at android.database.sqlite.SQLiteConnection.setJournalMode(SQLiteConnection.java:316)
at android.database.sqlite.SQLiteConnection.setWalModeFromConfiguration(SQLiteConnection.java:287)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:215)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:972)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:229)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
at roteiro.pap.pedro.roteiro.DBHelper.todosPOIs(DBHelper.java:135)
at roteiro.pap.pedro.roteiro.DBHelper$getData.doInBackground(DBHelper.java:128)
at roteiro.pap.pedro.roteiro.DBHelper.getTodosPOIs(DBHelper.java:115)
at roteiro.pap.pedro.roteiro.Lista.onCreate(Lista.java:60)
at android.app.Activity.performCreate(Activity.java:5122)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2446)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3953)
at android.app.ActivityThread.access$700(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1382)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5434)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:834)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
03-12 09:07:02.387 28028-28028/roteiro.pap.pedro.roteiro D/StrictMode﹕ StrictMode policy violation; ~duration=21 ms: android.os.StrictMode$StrictModeDiskReadViolation: policy=23 violation=2
at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1118)
at android.database.sqlite.SQLiteConnection.applyBlockGuardPolicy(SQLiteConnection.java:1038)
at android.database.sqlite.SQLiteConnection.executeForString(SQLiteConnection.java:635)
at android.database.sqlite.SQLiteConnection.setSyncMode(SQLiteConnection.java:294)
at android.database.sqlite.SQLiteConnection.setWalModeFromConfiguration(SQLiteConnection.java:288)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:215)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:972)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:229)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
at roteiro.pap.pedro.roteiro.DBHelper.todosPOIs(DBHelper.java:135)
at roteiro.pap.pedro.roteiro.DBHelper$getData.doInBackground(DBHelper.java:128)
at roteiro.pap.pedro.roteiro.DBHelper.getTodosPOIs(DBHelper.java:115)
at roteiro.pap.pedro.roteiro.Lista.onCreate(Lista.java:60)
at android.app.Activity.performCreate(Activity.java:5122)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2446)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3953)
at android.app.ActivityThread.access$700(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1382)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5434)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:834)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
03-12 09:07:02.388 28028-28028/roteiro.pap.pedro.roteiro D/StrictMode﹕ StrictMode policy violation; ~duration=19 ms: android.os.StrictMode$StrictModeDiskReadViolation: policy=23 violation=2
at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1118)
at android.database.sqlite.SQLiteConnection.applyBlockGuardPolicy(SQLiteConnection.java:1038)
at android.database.sqlite.SQLiteConnection.executeForLong(SQLiteConnection.java:592)
at android.database.sqlite.SQLiteConnection.setJournalSizeLimit(SQLiteConnection.java:264)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:216)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:972)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:229)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
at roteiro.pap.pedro.roteiro.DBHelper.todosPOIs(DBHelper.java:135)
at roteiro.pap.pedro.roteiro.DBHelper$getData.doInBackground(DBHelper.java:128)
at roteiro.pap.pedro.roteiro.DBHelper.getTodosPOIs(DBHelper.java:115)
at roteiro.pap.pedro.roteiro.Lista.onCreate(Lista.java:60)
at android.app.Activity.performCreate(Activity.java:5122)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2446)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3953)
at android.app.ActivityThread.access$700(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1382)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5434)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:834)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
03-12 09:07:02.388 28028-28028/roteiro.pap.pedro.roteiro D/StrictMode﹕ StrictMode policy violation; ~duration=18 ms: android.os.StrictMode$StrictModeDiskReadViolation: policy=23 violation=2
at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1118)
at android.database.sqlite.SQLiteConnection.applyBlockGuardPolicy(SQLiteConnection.java:1038)
at android.database.sqlite.SQLiteConnection.executeForLong(SQLiteConnection.java:592)
at android.database.sqlite.SQLiteConnection.setJournalSizeLimit(SQLiteConnection.java:266)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:216)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:972)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:229)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
at roteiro.pap.pedro.roteiro.DBHelper.todosPOIs(DBHelper.java:135)
at roteiro.pap.pedro.roteiro.DBHelper$getData.doInBackground(DBHelper.java:128)
at roteiro.pap.pedro.roteiro.DBHelper.getTodosPOIs(DBHelper.java:115)
at roteiro.pap.pedro.roteiro.Lista.onCreate(Lista.java:60)
at android.app.Activity.performCreate(Activity.java:5122)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2446)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3953)
at android.app.ActivityThread.access$700(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1382)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5434)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:834)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
03-12 09:07:02.389 28028-28028/roteiro.pap.pedro.roteiro D/StrictMode﹕
......
由于
答案 0 :(得分：1)
您可以执行以下操作：
private class getData extends AsyncTask<Void, Void, List<POI>>{
@Override
protected List<POI> doInBackground(Void... params) {
return todosPOIs();
}
@Override
protected void onPostExecute(List<POI> result) {
if(result.size > 0){
//Do with the result whatever you want
}
}
并使用new getData().execute();执行此操作，无论您要将其称为async method