How to start an existing instance of an action from a static shortcut

Question

I have an Activity (MainActivity) in my application and there is one static shortcut (pointing to TempActivity).

Since for static labels FLAG_ACTIVITY_NEW_TASK and FLAG_ACTIVITY_CLEAR_TASK will always be set, I created TempActivity, which is an invisible action, i.e. It launches MainActivity and then calls finish (). Also, as suggested in the documentation for developers, SecondActivity has android: taskAffinity = "" in the AndroidManifest.xml application file.

MainActivity has android: launchMode = "singleTop"

Even after this, MainActivity is launched in a new task instead of the existing one (created at startup from the main screen).

AndroidManifest.xml

<activity
            android:name=".MainActivity"
            android:launchMode="singleTop">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

            <meta-data
                android:name="android.app.shortcuts"
                android:resource="@xml/shortcuts" />
        </activity>
        <activity android:name=".TempActivity" android:taskAffinity=""></activity>

<shortcut
        android:enabled="true"
        android:icon="@drawable/icon"
        android:shortcutDisabledMessage="@string/app_name"
        android:shortcutId="static"
        android:shortcutLongLabel="@string/app_name"
        android:shortcutShortLabel="@string/app_name">
    <intent
        android:action="custom"
        android:targetClass="com.example.mobile.appshortcut.TempActivity"
        android:targetPackage="com.example.mobile.appshortcut" />
    </shortcut>

TempActivity.java

public class TempActivity extends AppCompatActivity {

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //setContentView(R.layout.activity_main2);
    //Intent intent = getIntent(); // From Shortcut
    Intent intent = new Intent(); // For Testing
    intent.setClass(this,MainActivity.class);
    startActivity(intent);
    finish();
}

@Override
protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
}

}

https://developer.android.com/reference/android/content/pm/ShortcutManager.html

Answer 1

android:taskAffinity="" MainActivity, TempActivity.

, AndroidManifest :

    <activity
        android:launchMode="singleTask"
        android:taskAffinity=""
        android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>

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

        <meta-data
            android:name="android.app.shortcuts"
            android:resource="@xml/shortcut"/>
    </activity>
    <activity
        android:name=".TempActivity"/>

TempActivity

public class TempActivity extends AppCompatActivity {

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        startActivity(new Intent(this, MainActivity.class));
        finish();
    }

}

, shortcut.xml

<shortcuts xmlns:android="http://schemas.android.com/apk/res/android">
    <shortcut
        android:enabled="true"
        android:shortcutDisabledMessage="@string/app_name"
        android:shortcutId="compose"
        android:shortcutLongLabel="@string/app_name"
        android:shortcutShortLabel="@string/app_name">
        <intent
            android:action="android.intent.action.VIEW"
            android:targetClass="kidinov.org.test.TempActivity"
            android:targetPackage="kidinov.org.test"/>
        <categories android:name="android.shortcut.conversation"/>
    </shortcut>
</shortcuts>

- . .

Answer 2

, FLAG_ACTIVITY_NEW_TASK, , .

MainActivity singleInstance. onStart/onRestart onNewIntent(Intent) ( reset TempActivity ).

@Override
protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
    if (intent.getAction().equals("custom")) {
        //reset
    }
}