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私のタブグループのアクティビティクラスでローカルアクティビティマネージャを使用して、Tabのb/wのさまざまなアクティビティを切り替えます。たとえば、メインタブ1からアクティビティを実行します。 > Act3。アンドロイドのローカルアクティビティマネージャーの問題
ここでは、act2ではtab1のデータに基づいてWebサービスを呼び出しますが、私はAct 3に移動します。しかし、私が戻るボタンAct2 onCreateをクリックすると、再び呼び出されます。
私は、アンドロイドのローカルアクティビティマネージャに問題があり、destroyメソッドに対応する修正コードを実装していることがわかりました。ここで
は、全体的なtabgroupのアクティビティコード..です
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Map;
import android.app.Activity;
import android.app.ActivityGroup;
import android.app.LocalActivityManager;
import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Window;
/**
* The purpose of this Activity is to manage the activities in a tab.
* Note: Child Activities can handle Key Presses before they are seen here.
* @author Eric Harlow
*/
public class TabGroupActivity extends ActivityGroup {
private ArrayList<String> mIdList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (mIdList == null) mIdList = new ArrayList<String>();
}
/**
* This is called when a child activity of this one calls its finish method.
* This implementation calls {@link LocalActivityManager#destroyActivity} on the child activity
* and starts the previous activity.
* If the last child activity just called finish(),this activity (the parent),
* calls finish to finish the entire group.
*/
@Override
public void finishFromChild(Activity child) {
LocalActivityManager manager = getLocalActivityManager();
int index = mIdList.size()-1;
if (index < 1) {
finish();
return;
}
System.out.println("Destroy called");
boolean rt=destroy(mIdList.get(index),manager);
System.out.println("Destroy called"+rt);
// manager.destroyActivity(mIdList.get(index), true);
mIdList.remove(index); index--;
String lastId = mIdList.get(index);
Intent lastIntent = manager.getActivity(lastId).getIntent();
Window newWindow = manager.startActivity(lastId, lastIntent);
setContentView(newWindow.getDecorView());
}
/**
* Starts an Activity as a child Activity to this.
* @param Id Unique identifier of the activity to be started.
* @param intent The Intent describing the activity to be started.
* @throws android.content.ActivityNotFoundException.
*/
public void startChildActivity(String Id, Intent intent) {
Window window = getLocalActivityManager().startActivity(Id,intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
if (window != null) {
mIdList.add(Id);
setContentView(window.getDecorView());
}
}
/**
* The primary purpose is to prevent systems before android.os.Build.VERSION_CODES.ECLAIR
* from calling their default KeyEvent.KEYCODE_BACK during onKeyDown.
*/
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
//preventing default implementation previous to android.os.Build.VERSION_CODES.ECLAIR
return true;
}
return super.onKeyDown(keyCode, event);
}
/**
* Overrides the default implementation for KeyEvent.KEYCODE_BACK
* so that all systems call onBackPressed().
*/
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
onBackPressed();
return true;
}
return super.onKeyUp(keyCode, event);
}
/**
* If a Child Activity handles KeyEvent.KEYCODE_BACK.
* Simply override and add this method.
*/
public void onBackPressed () {
int length = mIdList.size();
if (length > 1) {
Activity current = getLocalActivityManager().getActivity(mIdList.get(length-1));
System.out.println("Activity Being close"+current.getLocalClassName());
current.finish();
}
}
public boolean destroy(String id,LocalActivityManager activityManager) {
if(activityManager != null){
activityManager.destroyActivity(id, false);
// http://code.google.com/p/android/issues/detail?id=12359
// http://www.netmite.com/android/mydroid/frameworks/base/core/java/android/app/LocalActivityManager.java
try {
final Field mActivitiesField = LocalActivityManager.class.getDeclaredField("mActivities");
if(mActivitiesField != null){
mActivitiesField.setAccessible(true);
@SuppressWarnings("unchecked")
final Map<String, Object> mActivities = (Map<String, Object>)mActivitiesField.get(activityManager);
if(mActivities != null){
mActivities.remove(id);
}
final Field mActivityArrayField = LocalActivityManager.class.getDeclaredField("mActivityArray");
if(mActivityArrayField != null){
mActivityArrayField.setAccessible(true);
@SuppressWarnings("unchecked")
final ArrayList<Object> mActivityArray = (ArrayList<Object>)mActivityArrayField.get(activityManager);
if(mActivityArray != null){
for(Object record : mActivityArray){
final Field idField = record.getClass().getDeclaredField("id");
if(idField != null){
idField.setAccessible(true);
final String _id = (String)idField.get(record);
if(id.equals(_id)){
mActivityArray.remove(record);
break;
}
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
return false;
}
}
私は、いずれかのactivity.If再起動を防ぐ方法を知っている `tをソリューションは、私を助けて知っています。
ありがとうございました。
@Override
public void finishFromChild(Activity child) {
LocalActivityManager manager = getLocalActivityManager();
int index = mIdList.size()-1;
if (index < 1) {
finish();
return;
}
System.out.println("Destroy called");
destroy(mIdList.get(index),manager);
mIdList.remove(index); index--;
String lastId = mIdList.get(index);
Intent lastIntent = manager.getActivity(lastId).getIntent();
Window newWindow = manager.startActivity(lastId, lastIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP));
setContentView(newWindow.getDecorView());
}
私は同じ問題を抱えています。これはどれも解決できますか？ –