title: Import cannot be resolved on import android.hardware.camera2
body: <pre><code>import android.content.Context;
  import android.content.DialogInterface;
  import android.content.pm.PackageManager;
  import android.graphics.Camera;
  import android.hardware.camera2;
  import android.net.Uri;
  import android.os.Bundle;
  import android.support.v7.app.AppCompatActivity;
  import android.util.Log;
  import android.view.View;
  import android.widget.Button;
  import com.google.android.gms.appindexing.Action;
  import com.google.android.gms.appindexing.AppIndex;
  import com.google.android.gms.appindexing.Thing;
  import com.google.android.gms.common.api.GoogleApiClient;
  import java.security.Policy;
  
  public class FlashLightActivit extends AppCompatActivity {
  
      //flag to detect flash is on or off
      public boolean isLighOn = false;
  
      public Camera camera;
  
      public Button button;
      /**
       * ATTENTION: This was auto-generated to implement the App Indexing API.
       * See https://g.co/AppIndexing/AndroidStudio for more information.
       */
      private GoogleApiClient client;
  
      @Override
      protected void onStop() {
          super.onStop();// ATTENTION: This was auto-generated to implement the App Indexing API.
          // See https://g.co/AppIndexing/AndroidStudio for more information.
          AppIndex.AppIndexApi.end(client, getIndexApiAction());
  
          if (camera != null) {
              camera.relese();
          }
          // ATTENTION: This was auto-generated to implement the App Indexing API.
          // See https://g.co/AppIndexing/AndroidStudio for more information.
          client.disconnect();
      }
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
          button = (Button) findViewById(R.id.buttonFlashlight);
  
          Context context = this;
          PackageManager pm = context.getPackageManager();
  
          // if device support camera?
          if (!pm.hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
              Log.e("err", "Device has no camera!");
              return;
          }
  
          camera = Camera.open();
          final Policy.Parameters p = camera.getParameters();
  
          button.setOnClickListener(new DialogInterface.OnClickListener() {
  
              @Override
              public void onClick(DialogInterface dialogInterface, int i) {
  
              }
  
              @Override
              public int hashCode() {
                  return super.hashCode();
              }
  
              @Override
              public void onClick(View arg0) {
  
                  if (isLighOn) {
  
                      Log.i("info", "torch is turn off!");
  
                      p.setFlashMode(android.hardware.Camera.Parameters.FLASH_MODE_OFF);
                      camera.setParameters(p);
                      camera.stopPreview();
                      isLighOn = false;
  
                  } else {
  
                      Log.i("info", "torch is turn on!");
  
                      p.setFlashMode(android.hardware.Camera.Parameters.FLASH_MODE_TORCH);
  
                      camera.setParameters(p);
                      camera.startPreview();
                      isLighOn = true;
  
                  }
  
              }
          });
  
          // ATTENTION: This was auto-generated to implement the App Indexing API.
          // See https://g.co/AppIndexing/AndroidStudio for more information.
          client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
      }
  
      /**
       * ATTENTION: This was auto-generated to implement the App Indexing API.
       * See https://g.co/AppIndexing/AndroidStudio for more information.
       */
      public Action getIndexApiAction() {
          Thing object = new Thing.Builder()
                  .setName("FlashLightActivit Page") // TODO: Define a title for the content shown.
                  // TODO: Make sure this auto-generated URL is correct.
                  .setUrl(Uri.parse("http://[ENTER-YOUR-URL-HERE]"))
                  .build();
          return new Action.Builder(Action.TYPE_VIEW)
                  .setObject(object)
                  .setActionStatus(Action.STATUS_TYPE_COMPLETED)
                  .build();
      }
  
      @Override
      public void onStart() {
          super.onStart();
  
          // ATTENTION: This was auto-generated to implement the App Indexing API.
          // See https://g.co/AppIndexing/AndroidStudio for more information.
          client.connect();
          AppIndex.AppIndexApi.start(client, getIndexApiAction());
      }
  }
  </code></pre>