后退按钮显示接触后不工作 [英] Back button not working after displaying Contact

问题描述

我打从专业的Andr​​oid 4的可点击列表项code中的code基本上是：

 公共类MainActivity扩展ListActivity实现OnItemClickListener
{
    @覆盖
    公共无效的onCreate（包savedInstanceState）
    {
        super.onCreate（savedInstanceState）;

        CursorLoader装载机=新CursorLoader（这一点，Contacts.CONTENT_URI，空，
            NULL，NULL，Contacts.DISPLAY_NAME +ASC）;
        光标光标= loader.loadInBackground（）;

        的String []列=新的String [] {Contacts.DISPLAY_NAME};
        INT []意见=新INT [] {android.R.id.text1};

        SimpleCursorAdapter适配器=新SimpleCursorAdapter（这一点，
            android.R.layout.simple_list_item_1，光标，列，视图，
                CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER）;
        setListAdapter（适配器）;

        getListView（）setOnItemClickListener（本）。
    }

    @覆盖
    公共无效onItemClick（适配器视图＆LT;＆GT;适配器视图，视图中查看，INT位置，长ID）
    {
        乌里contactUri = ContentUris.withAppendedId（Contacts.CONTENT_URI，ID）;
        意向意图=新的意图（Intent.ACTION_VIEW，contactUri）;
        startActivity（意向）;
    }
}
 

这一切工作正常。我看到联系人列表，当我点击一个名字它打开地址簿的那个人。

的问题是，后退按钮不从地址簿工作。根据这本书，攻牙从地址簿中的后退按钮应该把我带回上述活动。但是相反，我带回到主屏幕。

我的应用程序仍在运行，当我切换到手动我回到它和列表视图是在适当的previous滚动位置，等等。

这是在Android 4.1.1。我不知道是否有额外的东西我应该实现，使这项工作？

这是清单文件：

 ＆LT;舱单的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
    包=com.example.contactslist
    安卓版code =1
    机器人：VERSIONNAME =1.0＆GT;

    ＆LT;用途-SDK
        安卓的minSdkVersion =16
        机器人：targetSdkVersion =15/＆GT;

    ＆LT;使用-权限的Andr​​oid：名称=android.permission.READ_CONTACTS/＆GT;

    ＆lt;应用
        机器人：图标=@可绘制/ ic_launcher
        机器人：标签=@字符串/ APP_NAME
        机器人：主题=@风格/ AppTheme＆GT;
        ＆LT;活动
            机器人：名称=。MainActivity
            机器人：标签=@字符串/ title_activity_main＆GT;
            ＆LT;意向滤光器＆gt;
                ＆lt;作用机器人：名称=android.intent.action.MAIN/＆GT;

                ＆LT;类机器人：名称=android.intent.category.LAUNCHER/＆GT;
            ＆所述; /意图滤光器＆gt;
        ＆LT; /活性GT;
    ＆LT; /用途＆gt;

＆LT; /舱单＆GT;
 

解决方案

听起来像是你的Activity栈是越来越搞砸了不知。 尝试添加下面你开始你的电话给startActivity（意向）

在

  intent.setFlags（Intent.FLAG_ACTIVITY_NEW_TASK）;
 

I am playing with the "Clickable List Items" code from Pro Android 4. The code is basically:

public class MainActivity extends ListActivity implements OnItemClickListener
{
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        CursorLoader loader = new CursorLoader(this, Contacts.CONTENT_URI, null,
            null, null, Contacts.DISPLAY_NAME + " ASC");
        Cursor cursor = loader.loadInBackground();

        String[] columns = new String[] { Contacts.DISPLAY_NAME };
        int[] views = new int[] { android.R.id.text1 };

        SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, 
            android.R.layout.simple_list_item_1, cursor, columns, views, 
                CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
        setListAdapter(adapter);

        getListView().setOnItemClickListener(this);
    }

    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int position, long id)
    {
        Uri contactUri = ContentUris.withAppendedId(Contacts.CONTENT_URI, id);
        Intent intent = new Intent(Intent.ACTION_VIEW, contactUri);
        startActivity(intent);
    }
}

This all works fine. I see the list of contacts and when I tap a name it opens the address book for that person.

The problem is that the Back button does not work from the address book. According to the book , tapping the back button from the address book should bring me back to the above Activity. But instead I am taken back to the home screen.

My app is still running, when I switch to it manually I get back to it and the list view is at the proper previous scroll position, etc.

This is on Android 4.1.1. I'm wondering if there is something extra I should implement to make this work?

This is the Manifest file:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.contactslist"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="15" />

    <uses-permission android:name="android.permission.READ_CONTACTS"/>

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

解决方案

Sounds like your Activity stack is getting messed up somehow. Try adding the following before you start your call to startActivity(intent)

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

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