ask for camera permissions in main activity

Author: codeanticode

mode/libraries/ar/src/processing/ar/PSurfaceAR.java

@@ -366,13 +366,6 @@ public void resumeThread() {
                         break;
                 }
 
-
-
-//                if (!sketch.hasPermission("android.permission.CAMERA")) {
-//                  sketch.requestPermission("android.permission.CAMERA");
-//                  return;
-//                }
-
                 session = new Session(activity);
             } catch (UnavailableArcoreNotInstalledException
                     | UnavailableUserDeclinedInstallationException e) {

studio/apps/arscene/src/main/java/arscene/MainActivity.java

@@ -1,16 +1,26 @@
 package arscene;
 
+import android.Manifest;
+import android.content.pm.PackageManager;
+import android.net.Uri;
 import android.os.Bundle;
 import android.content.Intent;
+import android.provider.Settings;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.content.ContextCompat;
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
 import android.support.v7.app.AppCompatActivity;
+import android.widget.Toast;
 
 import processing.android.PFragment;
 import processing.android.CompatUtils;
 import processing.core.PApplet;
 
 public class MainActivity extends AppCompatActivity {
+  private static final int CAMERA_PERMISSION_CODE = 0;
+  private static final String CAMERA_PERMISSION = Manifest.permission.CAMERA;
+
   private PApplet sketch;
 
   @Override
@@ -19,17 +29,31 @@ protected void onCreate(Bundle savedInstanceState) {
     FrameLayout frame = new FrameLayout(this);
     frame.setId(CompatUtils.getUniqueViewId());
     setContentView(frame, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
-                                                     ViewGroup.LayoutParams.MATCH_PARENT));
+        ViewGroup.LayoutParams.MATCH_PARENT));
 
     sketch = new Sketch();
     PFragment fragment = new PFragment(sketch);
     fragment.setView(frame, this);
   }
 
   @Override
-  public void onRequestPermissionsResult(int requestCode,
-                                         String permissions[],
-                                         int[] grantResults) {
+  protected void onResume() {
+    super.onResume();
+    if (!hasCameraPermission()) requestCameraPermission();
+  }
+
+  @Override
+  public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
+    if (!hasCameraPermission()) {
+      Toast.makeText(this, "Camera permission is needed to use AR", Toast.LENGTH_LONG)
+          .show();
+      if (!shouldShowRequestPermissionRationale()) {
+        // Permission denied with checking "Do not ask again".
+        launchPermissionSettings();
+      }
+      finish();
+    }
+
     if (sketch != null) {
       sketch.onRequestPermissionsResult(requestCode, permissions, grantResults);
     }
@@ -41,4 +65,41 @@ public void onNewIntent(Intent intent) {
       sketch.onNewIntent(intent);
     }
   }
+
+  @Override
+  public void onActivityResult(int requestCode, int resultCode, Intent data) {
+    if (sketch != null) {
+      sketch.onActivityResult(requestCode, resultCode, data);
+    }
+  }
+
+  @Override
+  public void onBackPressed() {
+    if (sketch != null) {
+      sketch.onBackPressed();
+    }
+  }
+
+  private boolean hasCameraPermission() {
+    int res = ContextCompat.checkSelfPermission(this, CAMERA_PERMISSION);
+    return res == PackageManager.PERMISSION_GRANTED;
+  }
+
+  private void requestCameraPermission() {
+    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, CAMERA_PERMISSION_CODE);
+  }
+
+  /** Check to see if we need to show the rationale for this permission. */
+  private boolean shouldShowRequestPermissionRationale() {
+    return ActivityCompat.shouldShowRequestPermissionRationale(this, CAMERA_PERMISSION);
+  }
+
+  /** Launch Application Setting to grant permission. */
+  private void launchPermissionSettings() {
+    Intent intent = new Intent();
+    intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
+    intent.setData(Uri.fromParts("package", this.getPackageName(), null));
+    this.startActivity(intent);
+  }
+
 }

studio/apps/arscene/src/main/java/arscene/Sketch.java

@@ -15,9 +15,9 @@ public void settings() {
 
   public void setup() {
     // I think this should go here but not 100% sure
-    if (!hasPermission("android.permission.CAMERA")) {
-      requestPermission("android.permission.CAMERA");
-    }
+//    if (!hasPermission("android.permission.CAMERA")) {
+//      requestPermission("android.permission.CAMERA");
+//    }
 //    sphere = createShape(SPHERE, 400);
 
     //Initialisation of AR Object

studio/libs/processing-ar/build.gradle

@@ -24,4 +24,5 @@ dependencies {
     implementation project(':libs:processing-core')
     implementation 'com.google.ar:core:1.2.0'
     implementation "de.javagl:obj:0.2.1"
+    implementation 'com.android.support:appcompat-v7:26.0.2'
 }