title: How can I display the activity when device is locked?
body: <p>I want to display one Activity Android, also when I lock my device.
  Every Time, if I lock my tablet (for example), I should to see one Activity.</p>
  
  <p>So, I have built this in AndroidManifest.xml:</p>
  
  <pre><code>&lt;activity
      android:name=".activity.SetupInfoEmergencyActivity"
      android:label="@string/app_name"
      android:showOnLockScreen="true"
      android:screenOrientation="sensorPortrait"&gt;
      &lt;intent-filter&gt;
          &lt;action android:name="android.intent.action.MAIN" /&gt;
          &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
      &lt;/intent-filter&gt;
  &lt;/activity&gt;
  </code></pre>
  
  <p>This is the code of activity</p>
  
  <pre><code>public class SetupInfoEmergencyActivity extends AppCompatActivity {
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
  
          getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON|
                  WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD|
                  WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED|
                  WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
          super.onCreate(savedInstanceState);
          setContentView(R.layout.settings_activity);
      }
  
  }
  </code></pre>
  
  <p>Now, if I try to run debug, I can see this activity, but if I un-lock my device, and I lock the device I can't see the activity.</p>