Android, having trouble starting an activity implicitly

android, android-implicit-intent, android-intent, intentfilter

Solution

First of all,

<uses-permission android:name="course.labs.permissions.DANGEROUS_ACTIVITY_PERM"/>

this should be in the app that you want to access this app.

let's say you have app A and you want to open Dangerous App, you put this permission usage to in A's manifest file.

Second :

You also need to tell application about permission. Add this permission to application.

<application
    android:permission="course.labs.permissions.DANGEROUS_ACTIVITY_PERM"
    <!-- your other attributes --> 
>

Third :

Intent filter should link to Activity not the permission string.

      <intent-filter>
            <action android:name="course.labs.permissions.DANGEROUS_ACTIVITY" />
            <category android:name="android.intent.category.DEFAULT" />
      </intent-filter>

Problem

so my main problem is starting a new app with an implicit intent. So here is the activity that is supposed to start the nem app: ``` package course.labs.permissionslab; public class GoToDangerousActivity extends Activity { private static final String TAG = "Lab-Permissions"; private static final String DANGEROUS_ACTIVITY_ACTION = "course.labs.permissions.DANGEROUS_ACTIVITY_PERM"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.go_to_dangerous_activity); Button startDangerousActivityButton = (Button) findViewById(R.id.start_dangerous_activity_button); startDangerousActivityButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { startDangerousActivity(); } }); } private void startDangerousActivity() { Log.i(TAG, "Entered startDangerousActivity()"); Intent dangerActivation = Intent.createChooser(new Intent(DANGEROUS_ACTIVITY_ACTION), "Choose yo.."); startActivity(dangerActivation); } } ``` I just added the appChoser so my my app doesnt break instantly. Now by strting the implicit intent "course.labs.permissions.DANGEROUS_ACTIVITY_PERM", what do I need to add to the other apps intent filters?? I will leave a copy of the other apps Manifest.XML to help spot the problem: ``` <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="course.labs.dangerousapp" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="13" android:targetSdkVersion="18" /> <!-- TODO - Using a permission element, define a custom permission with name "course.labs.permissions.DANGEROUS_ACTIVITY_PERM" and "dangerous" protection level. --> <permission android:protectionLevel="dangerous" android:name="course.labs.permissions.DANGEROUS_ACTIVITY_PERM"> </permission> <uses-permission android:name="course.labs.permissions.DANGEROUS_ACTIVITY"/> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <!-- TODO - enforce the custom permission on this Activity --> <activity android:name=".DangerousActivity" android:label="@string/app_name"> <!-- TODO - add additional intent filter info so that this Activity will respond to an Implicit Intent with the action "course.labs.permissions.DANGEROUS_ACTIVITY" --> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> <intent-filter> <action android:name="course.labs.permissions.DANGEROUS_ACTIVITY_PERM" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity> </application> </manifest> ```

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