Project import generated by Copybara.

GitOrigin-RevId: f9a66589eaf652bb93f8e37ed9e4da26e59ef214

mediapipe/examples/android/src/java/com/google/mediapipe/apps/basic/MainActivity.java

@@ -134,6 +134,9 @@ public class MainActivity extends AppCompatActivity {
   protected void onPause() {
     super.onPause();
     converter.close();
+
+    // Hide preview display until we re-open the camera again.
+    previewDisplayView.setVisibility(View.GONE);
   }
 
   @Override

mediapipe/examples/android/src/java/com/google/mediapipe/apps/iristrackinggpu/MainActivity.java

@@ -32,16 +32,22 @@ public class MainActivity extends com.google.mediapipe.apps.basic.MainActivity {
   private static final String FOCAL_LENGTH_STREAM_NAME = "focal_length_pixel";
   private static final String OUTPUT_LANDMARKS_STREAM_NAME = "face_landmarks_with_iris";
 
+  private boolean haveAddedSidePackets = false;
+
   @Override
   protected void onCameraStarted(SurfaceTexture surfaceTexture) {
     super.onCameraStarted(surfaceTexture);
 
-    float focalLength = cameraHelper.getFocalLengthPixels();
-    if (focalLength != Float.MIN_VALUE) {
-      Packet focalLengthSidePacket = processor.getPacketCreator().createFloat32(focalLength);
-      Map<String, Packet> inputSidePackets = new HashMap<>();
-      inputSidePackets.put(FOCAL_LENGTH_STREAM_NAME, focalLengthSidePacket);
-      processor.setInputSidePackets(inputSidePackets);
+    // onCameraStarted gets called each time the activity resumes, but we only want to do this once.
+    if (!haveAddedSidePackets) {
+      float focalLength = cameraHelper.getFocalLengthPixels();
+      if (focalLength != Float.MIN_VALUE) {
+        Packet focalLengthSidePacket = processor.getPacketCreator().createFloat32(focalLength);
+        Map<String, Packet> inputSidePackets = new HashMap<>();
+        inputSidePackets.put(FOCAL_LENGTH_STREAM_NAME, focalLengthSidePacket);
+        processor.setInputSidePackets(inputSidePackets);
+      }
+      haveAddedSidePackets = true;
     }
   }
 

mediapipe/examples/coral/Dockerfile

@@ -62,7 +62,7 @@ COPY . /mediapipe/
 
 # Install bazel
 # Please match the current MediaPipe Bazel requirements according to docs.
-ARG BAZEL_VERSION=2.0.0
+ARG BAZEL_VERSION=3.4.1
 RUN mkdir /bazel && \
     wget --no-check-certificate -O /bazel/installer.sh "https://github.com/bazelbuild/bazel/releases/download/${BAZEL_VERSION}/bazel-${BAZEL_VERSION}-installer-linux-x86_64.sh" && \
     wget --no-check-certificate -O  /bazel/LICENSE.txt "https://raw.githubusercontent.com/bazelbuild/bazel/master/LICENSE" && \