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vaibhavpandeyvpz/TimelineView.java

Last active March 19, 2022 19:15
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  1. vaibhavpandeyvpz revised this gist Sep 20, 2020. 1 changed file with 5 additions and 0 deletions.
    5 changes: 5 additions & 0 deletions attrs_timeline_view.xml
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    <resources>
    <declare-styleable name="TimelineView">
    <attr name="thumbnails_count" format="integer" />
    </declare-styleable>
    </resources>
  2. vaibhavpandeyvpz created this gist Sep 20, 2020.
    131 changes: 131 additions & 0 deletions TimelineView.java
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    package com.vaibhavpandey.trimview;

    import android.content.Context;
    import android.content.res.TypedArray;
    import android.graphics.Bitmap;
    import android.graphics.Canvas;
    import android.media.MediaMetadataRetriever;
    import android.media.ThumbnailUtils;
    import android.net.Uri;
    import android.os.Build;
    import android.util.AttributeSet;
    import android.util.Log;
    import android.view.View;

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

    import java.util.ArrayList;
    import java.util.List;
    import java.util.concurrent.TimeUnit;

    public class TimelineView extends View {

    private static final String TAG = "TimelineView";

    private int mThumbnailsCount = 10;
    private List<Bitmap> mVideoThumbnails = new ArrayList<>();
    private Uri mVideoURI;
    private int mWidth, mHeight;

    public TimelineView(Context context) {
    super(context);
    init(null, 0);
    }

    public TimelineView(Context context, AttributeSet attrs) {
    super(context, attrs);
    init(attrs, 0);
    }

    public TimelineView(Context context, AttributeSet attrs, int style) {
    super(context, attrs, style);
    init(attrs, style);
    }

    @Nullable
    public Uri getVideoURI() {
    return mVideoURI;
    }

    private void init(AttributeSet attrs, int style) {
    final TypedArray a = getContext().obtainStyledAttributes(
    attrs, R.styleable.TimelineView, style, 0);
    mThumbnailsCount = a.getInt(R.styleable.TimelineView_thumbnails_count, mThumbnailsCount);
    a.recycle();
    }

    @Override
    protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    int count = mVideoThumbnails.size();
    if (count <= 0) {
    return;
    }
    int width = mWidth / count;
    float offset = 0f;
    for (int i = 0; i < count; i++) {
    Bitmap thumbnail = mVideoThumbnails.get(i);
    if (thumbnail != null) {
    canvas.drawBitmap(thumbnail, offset, 0f, null);
    }
    offset += width;
    }
    }

    @Override
    protected void onSizeChanged(int w, int h, int ow, int oh) {
    super.onSizeChanged(w, h, ow, oh);
    Log.v(TAG, "Size changed from " + ow + "x" + oh + " to " + w + "x" + h + ".");
    mWidth = w;
    mHeight = h;
    if (h != oh && mVideoURI != null) {
    refresh();
    }
    }

    protected void refresh() {
    List<Bitmap> thumbnails = new ArrayList<>();
    MediaMetadataRetriever mmr = new MediaMetadataRetriever();
    mmr.setDataSource(getContext(), mVideoURI);
    String duration = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);
    //noinspection ConstantConditions
    long millis = Long.parseLong(duration);
    long interval = millis / 10;
    Log.v(TAG, "Extracting " + mThumbnailsCount + " frames at " + interval + "ms each.");
    for (int i = 0; i < mThumbnailsCount; i++) {
    Bitmap thumbnail = null;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
    //noinspection SuspiciousNameCombination
    thumbnail = mmr.getScaledFrameAtTime(
    TimeUnit.MILLISECONDS.toMicros(i * interval),
    MediaMetadataRetriever.OPTION_CLOSEST_SYNC,
    mHeight,
    mHeight
    );
    } else {
    Bitmap frame = mmr.getFrameAtTime(
    TimeUnit.MILLISECONDS.toMicros(i * interval),
    MediaMetadataRetriever.OPTION_CLOSEST_SYNC
    );
    if (frame != null) {
    //noinspection SuspiciousNameCombination
    thumbnail = ThumbnailUtils.extractThumbnail(frame, mHeight, mHeight);
    frame.recycle();
    }
    }
    thumbnails.add(thumbnail);
    }
    mmr.release();
    mVideoThumbnails.clear();
    mVideoThumbnails.addAll(thumbnails);
    invalidate();
    }

    public void setVideoURI(@NonNull Uri uri) {
    mVideoURI = uri;
    if (mHeight > 0) {
    refresh();
    }
    }
    }