wseemann.media.fmpdemo.CoverView.java Source code

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Here is the source code for wseemann.media.fmpdemo.CoverView.java

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/*
 * FFmpegMediaPlayer: A unified interface for playing audio files and streams.
 *
 * Copyright 2014 William Seemann
 * 
 * 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 wseemann.media.fmpdemo;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.os.Looper;
import android.support.v4.app.Fragment;
import android.util.AttributeSet;
import android.view.View;

public final class CoverView extends View {

    private CoverViewListener mListener;

    private Bitmap mBitmap = null;

    public CoverView(Context context, AttributeSet attributes) {
        super(context, attributes);
    }

    public void setup(Looper looper, Fragment fragment) {
        // Verify that the host activity implements the callback interface
        try {
            // Instantiate the CoverViewListener so we can send events to the host
            mListener = (CoverViewListener) fragment;
        } catch (ClassCastException e) {
            // The activity doesn't implement the interface, throw exception
            throw new ClassCastException(fragment.toString() + " must implement CoverViewListener");
        }
    }

    @Override
    protected void onDraw(Canvas canvas) {
        int width = getWidth();
        int height = getHeight();

        //canvas.drawColor(android.R.color.transparent);

        if (mBitmap != null) {
            int xOffset = (width - mBitmap.getWidth()) / 2;
            int yOffset = (height - mBitmap.getHeight()) / 2;
            canvas.drawBitmap(mBitmap, xOffset, yOffset, null);
        }
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        if (w != 0 && h != 0) {
            if (mListener != null) {
                mListener.onCoverViewInitialized();
            }
        }
    }

    public boolean generateBitmap(long id) {
        Bitmap b = null;

        int width = getWidth();
        int height = getHeight();

        if (width == 0 || height == 0) {
            return false;
        }

        int scale = Math.min(width, height);

        Context context = getContext();

        b = MusicUtils.getDefaultArtwork(context, R.drawable.albumart_mp_unknown, scale, scale);

        mBitmap = b;
        postInvalidate();

        return true;
    }

    @Override
    protected void onMeasure(int widthSpec, int heightSpec) {
        int width = View.MeasureSpec.getSize(widthSpec);
        int height = View.MeasureSpec.getSize(heightSpec);

        if (View.MeasureSpec.getMode(widthSpec) == View.MeasureSpec.EXACTLY
                && View.MeasureSpec.getMode(heightSpec) == View.MeasureSpec.EXACTLY) {
            setMeasuredDimension(width, height);
        } else {
            int size = Math.min(width, height);
            setMeasuredDimension(size, size);
        }
    }

    /* The activity that creates an instance of this class must
     * implement this interface in order to receive event callbacks. */
    public interface CoverViewListener {
        public void onCoverViewInitialized();
    }
}