Android開發--基於vitamio的視頻播放器（二）

??終於把該忙的事情都忙得差不多了，接下來又可以開始good good study，day day up了。在Android開發學習之路–基於vitamio的視頻播放器（一）中，主要講了播放器的界面的簡單實現，以及掃描視頻文件，獲取視頻文件的部分信息，還沒開始講解如何使用vitamio這個庫，這裡就開始講解下最簡單的使用方法吧。

1.接口的簡單使用

??layout界面:

??io.vov.vitamio.widget.CenterLayout是vitamio提供的widget居中布局，然後io.vov.vitamio.widget.VideoView就是顯示的播放界面了，其實主要就是個surfaceview。接著看下activity代碼：

package com.jared.jplayer.ui;

import android.content.Context;
import android.content.Intent;
import android.databinding.DataBindingUtil;
import android.widget.Toast;

import com.jared.jplayer.R;
import com.jared.jplayer.app.BaseActivity;
import com.jared.jplayer.common.MyMediaController;
import com.jared.jplayer.databinding.LocalPlayerBinding;

import io.vov.vitamio.MediaPlayer;
import io.vov.vitamio.Vitamio;

/**
 * Created by jared on 2016/9/29.
 */
public class LocalVideoPlayer extends BaseActivity {

    private String subtitle_path = "";
    private long mPosition = 0;

    private LocalPlayerBinding binding;

    public static void launch(Context context, String url) {
        Intent intent = new Intent(context, LocalVideoPlayer.class);
        intent.putExtra("url", url);
        context.startActivity(intent);
    }

    @Override
    protected void initParams() {
        Vitamio.isInitialized(getActivity());
        binding = DataBindingUtil.setContentView(getActivity(), R.layout.activity_local_player);
    }

    @Override
    protected void initViews() {
        super.initViews();
        String url = getActivity().getIntent().getStringExtra("url");
        initVideo("file://"+url);
    }

    @Override
    protected void onPause() {
        mPosition = binding.surfaceView.getCurrentPosition();
        binding.surfaceView.stopPlayback();
        super.onPause();
    }

    @Override
    protected void onResume() {
        if (mPosition > 0) {
            binding.surfaceView.seekTo(mPosition);
            mPosition = 0;
        }
        super.onResume();
        binding.surfaceView.start();
    }

    private void initVideo(String path) {

        if (path == "") {
            // Tell the user to provide a media file URL/path.
            Toast.makeText(getActivity(), "Please edit VideoViewSubtitle Activity, and set path" + " variable to your media file URL/path", Toast.LENGTH_LONG).show();
            return;
        } else {

            binding.surfaceView.setVideoPath(path);

            MyMediaController myMediaController = new MyMediaController(getActivity());
            binding.surfaceView.setMediaController(myMediaController);
            binding.surfaceView.requestFocus();

            binding.surfaceView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                @Override
                public void onPrepared(MediaPlayer mediaPlayer) {
                    // optional need Vitamio 4.0
                    mediaPlayer.setPlaybackSpeed(1.0f);
                    binding.surfaceView.addTimedTextSource(subtitle_path);
                    binding.surfaceView.setTimedTextShown(true);

                }
            });
            binding.surfaceView.setOnTimedTextListener(new MediaPlayer.OnTimedTextListener() {

                @Override
                public void onTimedText(String text) {
                    binding.subtitleView.setText(text);
                }

                @Override
                public void onTimedTextUpdate(byte[] pixels, int width, int height) {

                }
            });
        }
    }
}

??這裡看下initVideo代碼，binding.surfaceView.setVideoPath(path);設置播放的路徑，這裡的路徑是之前的播放列表中已經掃描出來的然後解析出來通過launch方法傳遞給LocalVideoPlayer的。這裡自定義了controller，然後通過controller就可以控制播放暫停等功能了，接著來看controller。

2.自定義MediaController

package com.jared.jplayer.common;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;

import com.jared.jplayer.R;

import io.vov.vitamio.widget.MediaController;

/**
 * Created by jared on 2016/9/28.
 */
public class MyMediaController extends MediaController {

    Context mContext;

    public MyMediaController(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
    }

    public MyMediaController(Context context) {
        super(context);
        mContext = context;
    }

    @Override
    protected View makeControllerView() {
        return ((LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.mymediacontroller, this);
        //return super.makeControllerView();
    }

}

??繼承了MediaController，重新的布局了界面，接著看下新的布局：

??注意的是這裡的id的名字必須不能變，因為vitamio的mediacontroller會根據id來做對應的事情的。
??vitamio的接口還是比較簡潔的，省去了很多事情，需要考慮的事情基本上都做好了，它是基於ffmpeg做的，之後有機會也可以深入學習下。