主屏幕点击事件上的应用程序图标

Question

Each time my app icon from home screen is clicked, I want the app to start my FirstActivity.java . The problem now is, say I have navigated through my app and is in the ThirdActivity.java and I have clicked the home Button and go to check out my other apps. Again when I click the app icon in home screen, my Application starts from ThirdActivity.java . I want it to start from FirstActivity.java .

I have used clearTaskOnLaunch="true" in manifest for my FirstActivity.java and also checked using android:finishOnTaskLaunch ="true" in all my other activities but the problem is still there. How can I solve this?

Answer 1

All I have to do was declare android:launchMode="singleTask" in manifest for my FirstActivity.java "only". By doing this, every time user selects the app by clicking the app icon in the home screen, app will start with FirstActivity.java

Say the user has navigated through my app and is in the ThirdActivity.java and clicked the home Button. The user has the option of selecting the app again from the background apps section (task manager section). If he/she does so, it will start from where he/she has left (ThirdActivity.java). Only if they click the app icon will the app start from FirstActivity.java

Answer 2

您需要在启动新活动的意图时完成当前活动，有一种方法可以执行finish();

Answer 3

In your oncreate you just have to start your activity using Intent

In manifest you have to provide name attribute to application tag

<application
        android:allowBackup="true"

        android:icon="@drawable/app_logo"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" 

       android:name=".class name which extends Application"

        >

Here you can see details on how to use application class: http://www.intertech.com/Blog/androids-application-class/

http://developer.android.com/reference/android/app/Application.html

http://androidexample.com/Global_Variable_Or_Application_Context_Variable_-_Android_Example/index.php?view=article_discription&aid=114&aaid=136

Answer 4

You can use this code in onPause() of the second third activity but you have to take care of if onPause() is called because of clicking home button or by any other mean, Code is:

Intent intent = new Intent(AnyActivity.this,FirstActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
startActivity(intent);
finish();

Answer 5

单击主页按钮并启动所需的活动时，可以使用moveTaskToBack(true) 。

Answer 6

I had resolved the issue by adding all three tags android:launchMode="singleTask" android:clearTaskOnLaunch="true" android:finishOnTaskLaunch ="true" in manifest splash screen activity may be helped some one:

<activity
        android:name=".SplashscreenActivity"
        android:configChanges="orientation|keyboardHidden|screenSize"
        android:label="@string/app_name"
        android:launchMode="singleTask"
        android:clearTaskOnLaunch="true"
        android:finishOnTaskLaunch ="true"
        android:screenOrientation="portrait"
        android:theme="@style/AppThemeForAppCompact">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

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