Question

我使用以下示例代码创建了我的标签，并在评论中注意到许多人无法再调用搜索对话框，而且当您单击硬件时我无法再关闭程序强制搜索按钮但是当你点击按钮时它不再弹出任何东西。

有人知道如何解决这个问题吗？

Multiple Android Activities with TabActivity

import java.util.ArrayList;
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;
} 

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.
*/
@Override
public void onBackPressed () {
int length = mIdList.size();
if ( length > 1) {
Activity current = getLocalActivityManager().getActivity(mIdList.get(length-1));
current.finish();
}
}
}

@Override
public void onBackPressed() {
TabGroupActivity parentActivity = (TabGroupActivity)getParent();
parentActivity.onBackPressed();
}

以下部分说明了我如何使用此ActivityGroup。我做的第一件事是像这样继承这个ActivityGroup。

 import android.content.Intent;
 import android.os.Bundle;

 public class TabGroup1Activity extends TabGroupActivity {
 @Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 startChildActivity("OptionsActivity", new Intent(this,OptionsActivity.class));
 }
 }

我将此TabGroup1Activity添加到我的TabActivity中。

TabHost tabHost = getTabHost();

tabHost.addTab(tabHost.newTabSpec("tab1")
.setIndicator("MESSAGES")
.setContent(new Intent(this, TabGroup1Activity.class)));

然后，您希望在ActivityGroup中启动的任何Activity都可以采用与此类似的方式完成。

Intent frequentMessages = new Intent(getParent(), FrequentMessageActivity.class);
TabGroupActivity parentActivity = (TabGroupActivity)getParent();
parentActivity.startChildActivity("FrequentMessageActivity", frequentMessages);

我已经在Android Manifest中搜索了我的所有活动，并且我遵循了实施搜索的教程。

Creating a Search Interface

在修改我的代码以使用TabActivity之前，搜索按预期工作，但代码中的某些内容破坏了搜索功能。

Answer 1

我找到了一个我正在解密的解决方案，但我希望有更多知道如何根据问题中发布的教程示例中给出的示例帮助实现它。

这是我找到但尚未应用的解决方案 Nested TabHosts

TabHost实现不会出现搜索对话框

1 个答案: