startActivityForResult() immediately call OnActivityResult when call another app

Question

I have 2 app, A and B.

in app A, I want to call app B and get result from app B. I try this Code:

Intent launchIntent = getPackageManager().getLaunchIntentForPackage("com.app.B"); startActivityForResult(launchIntent, CODE);

but after I called that code, the onActivityResult() method called immediately and give result RESULT_CANCELLED.

App B manifest:

<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.app.B"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".TestActivity" android:label="@string/app_name" android:windowSoftInputMode="adjustResize" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>

App B TestActivity:

protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test); if (getCallingActivity() == null) { startActivity(new Intent(this, MainActivity.class)); finish(); } else { Intent returnIntent = new Intent(); setResult(RESULT_OK, returnIntent); finish(); } }

Community · Accepted Answer · 2017-05-23 12:24:27Z

3

I just add launchIntent.setFlags(0); before startActivityForResult() based on this answer

edited May 23, 2017 at 12:24

CommunityBot

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answered May 29, 2015 at 9:55

Rama Bramantara

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Comments

Senthil Vidhiyakar · Accepted Answer · 2016-11-29 08:33:34Z

That is what you have coded for.. Once the Activity of B app is launched you have called the setResult method because it is in the onCreate() method.. The reason you are getting failed result code is because you have set

setResult(RESULT_OK, returnIntent)

but you should have used Activity.RESULT_OK like

setResult(Activity.RESULT_OK, returnIntent)

Vladyslav Matviienko · Accepted Answer · 2015-05-29 07:45:36Z

getCallingActivity()

woun't be null only in case if you would call the specific Activity with your startActivityForResult Intent.
But you are calling not the specific activity, but getPackageManager().getLaunchIntentForPackage("com.app.B");
which retrieves the default launch activity of the specified package, and starts it with default(empty) intent.

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