Add button to show/hide input player in TransformerActivity

PiperOrigin-RevId: 479003655
(cherry picked from commit 20c1ae14)

demos/transformer/src/main/java/com/google/android/exoplayer2/transformerdemo/TransformerActivity.java

@@ -31,6 +31,7 @@ import android.view.SurfaceHolder;
 import android.view.SurfaceView;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.Button;
 import android.widget.TextView;
 import android.widget.Toast;
 import androidx.annotation.Nullable;
@@ -77,6 +78,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
 public final class TransformerActivity extends AppCompatActivity {
   private static final String TAG = "TransformerActivity";
 
+  private @MonotonicNonNull Button displayInputButton;
   private @MonotonicNonNull MaterialCardView inputCardView;
   private @MonotonicNonNull StyledPlayerView inputPlayerView;
   private @MonotonicNonNull StyledPlayerView outputPlayerView;
@@ -106,6 +108,8 @@ public final class TransformerActivity extends AppCompatActivity {
     progressViewGroup = findViewById(R.id.progress_view_group);
     progressIndicator = findViewById(R.id.progress_indicator);
     debugFrame = findViewById(R.id.debug_aspect_ratio_frame_layout);
+    displayInputButton = findViewById(R.id.display_input_button);
+    displayInputButton.setOnClickListener(this::toggleInputVideoDisplay);
 
     transformationStopwatch =
         Stopwatch.createUnstarted(
@@ -130,6 +134,7 @@ public final class TransformerActivity extends AppCompatActivity {
     checkNotNull(debugTextView);
     checkNotNull(progressViewGroup);
     checkNotNull(debugFrame);
+    checkNotNull(displayInputButton);
     startTransformation();
 
     inputPlayerView.onResume();
@@ -159,6 +164,7 @@ public final class TransformerActivity extends AppCompatActivity {
     "inputCardView",
     "inputPlayerView",
     "outputPlayerView",
+    "displayInputButton",
     "debugTextView",
     "informationTextView",
     "progressIndicator",
@@ -228,6 +234,7 @@ public final class TransformerActivity extends AppCompatActivity {
     "inputCardView",
     "inputPlayerView",
     "outputPlayerView",
+    "displayInputButton",
     "debugTextView",
     "informationTextView",
     "transformationStopwatch",
@@ -464,6 +471,7 @@ public final class TransformerActivity extends AppCompatActivity {
     "inputCardView",
     "inputPlayerView",
     "outputPlayerView",
+    "displayInputButton",
     "debugTextView",
     "informationTextView",
     "progressViewGroup",
@@ -479,6 +487,7 @@ public final class TransformerActivity extends AppCompatActivity {
     debugFrame.removeAllViews();
     inputCardView.setVisibility(View.VISIBLE);
     outputPlayerView.setVisibility(View.VISIBLE);
+    displayInputButton.setVisibility(View.VISIBLE);
     playMediaItems(inputMediaItem, MediaItem.fromUri("file://" + filePath));
     Log.d(TAG, "Output file path: file://" + filePath);
   }
@@ -541,6 +550,21 @@ public final class TransformerActivity extends AppCompatActivity {
     Toast.makeText(getApplicationContext(), getString(messageResource), Toast.LENGTH_LONG).show();
   }
 
+  @RequiresNonNull({
+    "inputCardView",
+    "displayInputButton",
+  })
+  private void toggleInputVideoDisplay(View view) {
+    if (inputCardView.getVisibility() == View.GONE) {
+      inputCardView.setVisibility(View.VISIBLE);
+      displayInputButton.setText(getString(R.string.hide_input_video));
+    } else if (inputCardView.getVisibility() == View.VISIBLE) {
+      checkNotNull(inputPlayer).pause();
+      inputCardView.setVisibility(View.GONE);
+      displayInputButton.setText(getString(R.string.show_input_video));
+    }
+  }
+
   private final class DemoDebugViewProvider implements DebugViewProvider {
 
     private @MonotonicNonNull SurfaceView surfaceView;

demos/transformer/src/main/res/layout/transformer_activity.xml

@@ -29,12 +29,28 @@
     app:cardElevation="2dp"
     android:gravity="center_vertical" >
 
-    <TextView
-      android:id="@+id/information_text_view"
-      android:layout_width="wrap_content"
-      android:layout_height="match_parent"
+    <LinearLayout
+      android:layout_width="match_parent"
       android:orientation="vertical"
-      android:padding="8dp" />
+      android:layout_height="wrap_content">
+
+      <TextView
+        android:id="@+id/information_text_view"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:padding="8dp" />
+
+      <Button
+        android:id="@+id/display_input_button"
+        android:visibility="gone"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/hide_input_video"
+        android:layout_margin="8dp" />
+
+
+    </LinearLayout>
 
   </com.google.android.material.card.MaterialCardView>
 

demos/transformer/src/main/res/values/strings.xml

@@ -61,4 +61,6 @@
   <string name="lightness_adjustment">Lightness adjustment</string>
   <string name="input_video">Input video:</string>
   <string name="output_video">Output video:</string>
+  <string name="hide_input_video">Hide input video</string>
+  <string name="show_input_video">Show input video</string>
 </resources>