src/com/android/wallpaper/widget/WallpaperInfoView.java

/*
 * Copyright (C) 2020 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.wallpaper.widget;

import android.content.Context;
import android.os.Handler;
import android.os.Looper;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

import com.android.wallpaper.R;
import com.android.wallpaper.model.WallpaperInfo;

import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/** A view for displaying wallpaper info. */
public class WallpaperInfoView extends LinearLayout {
    private static final ExecutorService sExecutorService = Executors.newCachedThreadPool();
    private TextView mTitle;
    private TextView mSubtitle1;
    private TextView mSubtitle2;
    private Button mExploreButton;

    public WallpaperInfoView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        mTitle = findViewById(R.id.wallpaper_info_title);
        mSubtitle1 = findViewById(R.id.wallpaper_info_subtitle1);
        mSubtitle2 = findViewById(R.id.wallpaper_info_subtitle2);
        mExploreButton = findViewById(R.id.wallpaper_info_explore_button);
    }

    /** Populates wallpaper info. */
    public void populateWallpaperInfo(@NonNull WallpaperInfo wallpaperInfo,
                                      CharSequence actionLabel,
                                      boolean shouldShowExploreButton,
                                      OnClickListener exploreButtonClickListener) {
        sExecutorService.execute(() -> {
            final List<String> attributions = wallpaperInfo.getAttributions(getContext());
            new Handler(Looper.getMainLooper()).post(() -> {
                // Reset wallpaper information UI
                mTitle.setText(null);
                mSubtitle1.setText(null);
                mSubtitle1.setVisibility(View.GONE);
                mSubtitle2.setText(null);
                mSubtitle2.setVisibility(View.GONE);
                mExploreButton.setText(null);
                mExploreButton.setOnClickListener(null);
                mExploreButton.setVisibility(View.GONE);

                if (attributions.size() > 0 && attributions.get(0) != null) {
                    mTitle.setText(attributions.get(0));
                }

                if (shouldShowMetadata(wallpaperInfo)) {
                    if (attributions.size() > 1 && attributions.get(1) != null) {
                        mSubtitle1.setVisibility(View.VISIBLE);
                        mSubtitle1.setText(attributions.get(1));
                    }

                    if (attributions.size() > 2 && attributions.get(2) != null) {
                        mSubtitle2.setVisibility(View.VISIBLE);
                        mSubtitle2.setText(attributions.get(2));
                    }

                    if (shouldShowExploreButton) {
                        mExploreButton.setVisibility(View.VISIBLE);
                        mExploreButton.setText(actionLabel);
                        mExploreButton.setOnClickListener(exploreButtonClickListener);
                    }
                }
            });
        });
    }

    private boolean shouldShowMetadata(WallpaperInfo wallpaperInfo) {
        android.app.WallpaperInfo wallpaperComponent = wallpaperInfo.getWallpaperComponent();
        return wallpaperComponent == null || wallpaperComponent.getShowMetadataInPreview();
    }
}