[Component name]How to use activityoptions.makescenetransitionanimation after I use it, the animation effect is abnormal and the black screen flashes

Description: this two actiivty ,i want from this actiivty launch another activity show anim Effects like MusicPlayerDemoActivity，but my app not fragment! i try use material demo ,is work ,but my app flash blackscreen

However, an activity in the Material-component Demo also flashes a black screen item is Transition/ launch Container Transform (Activity ) Source code:

 public static void startNewActivityAnim(Activity activity,
                                            Class activityTarget,
                                            View v
    ) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
//            activity.setEnterSharedElementCallback(new MaterialContainerTransformSharedElementCallback());
            activity.setExitSharedElementCallback(new MaterialContainerTransformSharedElementCallback());
            activity.getWindow().setSharedElementsUseOverlay(false);
            String shareName = activityTarget.getSimpleName();
            ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(activity, v, shareName);
            Intent intent = new Intent(activity, activityTarget);
            intent.putExtra("share_element",shareName);
            activity.startActivity(intent, options.toBundle());
        } else {
            activity.startActivity(new Intent(activity, activityTarget));

        }


    }

 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                        View contentView = findViewById(android.R.id.content);
                        contentView.setTransitionName(share_element);
                        setEnterSharedElementCallback(new MaterialContainerTransformSharedElementCallback());

                        getWindow().setSharedElementEnterTransition(buildContainerTransform(/* entering= */ true, getThis(), contentView));
                        getWindow().setSharedElementReturnTransition(buildContainerTransform(/* entering= */ false, getThis(), contentView));
                    }

    @RequiresApi(Build.VERSION_CODES.LOLLIPOP)
    public static MaterialContainerTransform buildContainerTransform(boolean entering, Context context, View view) {
        MaterialContainerTransform transform = new MaterialContainerTransform(context, entering);
        transform.addTarget(android.R.id.content);
        transform.setContainerColor(MaterialColors.getColor(view, R.attr.colorSurface));
        transform.setFadeMode(MaterialContainerTransform.FADE_MODE_THROUGH);
        return transform;
    }

,use material componet add TestActivity, it work

package io.material.catalog.main;

import android.app.ActivityOptions;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.view.View;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.FragmentActivity;

import com.google.android.material.transition.platform.MaterialContainerTransformSharedElementCallback;

import io.material.catalog.R;
import io.material.catalog.feature.DemoActivity;
import io.material.catalog.musicplayer.MusicPlayerDemoActivity;

/**
 * Author:Lozn
 * Email:[e-mail]
 * 2021/10/25
 * 9:36
 */
public class TestActivity extends AppCompatActivity {

  private View rootView;

  @Override
  protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.new_music);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
      rootView = this.getWindow().getDecorView().findViewById(android.R.id.content);
//      rootView.setTransitionName("test");
    }

    findViewById(R.id.tv_main).setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View view) {
        Intent intent = new Intent(TestActivity.this, MainActivity.class);
        startActivity(intent);
      }
    });
    findViewById(R.id.tv_test).setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View view) {
        Intent intent = new Intent(TestActivity.this, MusicPlayerDemoActivity.class);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
          // Set up shared element transition and disable overlay so views don't show above system bars
          FragmentActivity activity = TestActivity.this;
          activity.setExitSharedElementCallback(new MaterialContainerTransformSharedElementCallback());
          activity.getWindow().setSharedElementsUseOverlay(false);

          ActivityOptions options =
              ActivityOptions.makeSceneTransitionAnimation(activity, view, "test");
          intent.putExtra(DemoActivity.EXTRA_TRANSITION_NAME, "test");
          startActivity(intent, options.toBundle());

        } else {
          startActivity(intent);
        }

      }
    });
  }
}

Android API version: android 11 api 30

Material Library version: implementation ‘com.google.android.material:material:1.5.0-alpha02’

[drchen]

Makes sense. I’ll keep the issue as opened and see if we can have a solution on the library side.

[pubiqq]

Well, there are many solutions:

• MaterialContainerTransformSharedElementCallback#setTransparentWindowBackgroundEnabled(false)
• Window#setSharedElementsUseOverlay(false)
• Window#setTransitionBackgroundFadeDuration(transform.getDuration() + EXTRA_DURATION)

but it seems to me it’s too premature to close the issue:

• TransitionContainerTransformStartDemoActivity still doesn’t work correctly
• setTransparentWindowBackgroundEnabled(true) should work correctly, should it not?
• Shouldn’t the library take care of meeting this condition on its own? (from MaterialContainerTransformSharedElementCallback#setTransparentWindowBackgroundEnabled doc)

  Note: in order to avoid some visual artifacts, when this setting is enabled the window’s transition background fade duration (see Window.setTransitionBackgroundFadeDuration(long)) will be overridden to be greater than the duration of the transform transition.