学步园

1、一开始以为只要传一个文件的路径就可以了：

String path = "/mnt/sdcard/movie/test.mp4";
mLibVLC.readMedia(pathUri);

查看了例程才发现，必须转换为它的URI格式

String path = "/mnt/sdcard/movie/test.mp4";
String pathUri = LibVLC.getInstance().nativeToURI(path);
mLibVLC.readMedia(pathUri, false);

 这里nativeToURI是一个JNI接口，代码在Libvlcjni.c中：

    jstring Java_org_videolan_vlc_LibVLC_nativeToURI(JNIEnv *env, jobject thiz, jstring path)
    {
        jboolean isCopy;
        /* Get C string */
        const char* psz_path = (*env)->GetStringUTFChars(env, path, &isCopy);
        /* Convert the path to URI */
        char* psz_location;
        if(unlikely( strstr( psz_path, "://" ) ))
            psz_location = strdup(psz_path);
        else
            psz_location = vlc_path2uri(psz_path, "file");
        /* Box into jstring */
        jstring t = (*env)->NewStringUTF(env, psz_location);
        /* Clean up */
        (*env)->ReleaseStringUTFChars(env, path, psz_path);
        free(psz_location);
        return t;
    }

2、还是一直都没有出视频，调试例程后才发现，需要增加两个函数

public void setSurfaceSize(int width, int height);

private void changeSurfaceSize() ;

主要代码如下：

package com.lau.vlcdemo;

import org.videolan.vlc.EventManager;
import org.videolan.vlc.LibVLC;
import org.videolan.vlc.LibVlcException;
import org.videolan.vlc.WeakHandler;

import android.app.Activity;
import android.content.res.Configuration;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.Toast;

public class VLCDemoActivity extends Activity implements SurfaceHolder.Callback, OnClickListener {
	
	public final static String TAG = "VLC/VideoPlayerActivity";
	
	private SurfaceView surfaceView = null;
	private SurfaceHolder surfaceHolder = null;
	private LibVLC mLibVLC = null;
	private Button button = null;


    private int mVideoHeight;
    private int mVideoWidth;
    
    private static final int SURFACE_SIZE = 3;
    
    private static final int SURFACE_BEST_FIT = 0;
    private static final int SURFACE_FIT_HORIZONTAL = 1;
    private static final int SURFACE_FIT_VERTICAL = 2;
    private static final int SURFACE_FILL = 3;
    private static final int SURFACE_16_9 = 4;
    private static final int SURFACE_4_3 = 5;
    private static final int SURFACE_ORIGINAL = 6;
    private int mCurrentSize = SURFACE_BEST_FIT;
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        surfaceView = (SurfaceView) findViewById(R.id.main_sfv);
        button = (Button) findViewById(R.id.main_btn);
        
        surfaceHolder = surfaceView.getHolder();
        surfaceHolder.setFormat(PixelFormat.RGBX_8888);
        surfaceHolder.addCallback(this);
        button.setOnClickListener(this);
        try {
        	LibVLC.useIOMX(getApplicationContext());
			mLibVLC = LibVLC.getInstance();
		} catch (LibVlcException e) {
			e.printStackTrace();
		}
    }

	@Override
	public void onConfigurationChanged(Configuration newConfig) {
		super.onConfigurationChanged(newConfig);
	}

    public void setSurfaceSize(int width, int height) {
        // store video size
        mVideoHeight = height;
        mVideoWidth = width;
        Message msg = mHandler.obtainMessage(SURFACE_SIZE);
        mHandler.sendMessage(msg);
    }

    private final Handler mHandler = new VideoPlayerHandler(this);

    private static class VideoPlayerHandler extends WeakHandler<VLCDemoActivity> {
        public VideoPlayerHandler(VLCDemoActivity owner) {
            super(owner);
        }

        @Override
        public void handleMessage(Message msg) {
            VLCDemoActivity activity = getOwner();
            if(activity == null) // WeakReference could be GC'ed early
                return;

            switch (msg.what) {
                case SURFACE_SIZE:
                    activity.changeSurfaceSize();
                    break;
            }
        }
    };
    
    
    private void changeSurfaceSize() {
        // get screen size
        int dw = getWindow().getDecorView().getWidth();
        int dh = getWindow().getDecorView().getHeight();

        // getWindow().getDecorView() doesn't always take orientation into account, we have to correct the values
        boolean isPortrait = getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT;
        if (dw > dh && isPortrait || dw < dh && !isPortrait) {
            int d = dw;
            dw = dh;
            dh = d;
        }
        if (dw * dh == 0)
            return;

        // calculate aspect ratio
        double ar = (double) mVideoWidth / (double) mVideoHeight;
        // calculate display aspect ratio
        double dar = (double) dw / (double) dh;

        switch (mCurrentSize) {
            case SURFACE_BEST_FIT:
                if (dar < ar)
                    dh = (int) (dw / ar);
                else
                    dw = (int) (dh * ar);
                break;
            case SURFACE_FIT_HORIZONTAL:
                dh = (int) (dw / ar);
                break;
            case SURFACE_FIT_VERTICAL:
                dw = (int) (dh * ar);
                break;
            case SURFACE_FILL:
                break;
            case SURFACE_16_9:
                ar = 16.0 / 9.0;
                if (dar < ar)
                    dh = (int) (dw / ar);
                else
                    dw = (int) (dh * ar);
                break;
            case SURFACE_4_3:
                ar = 4.0 / 3.0;
                if (dar < ar)
                    dh = (int) (dw / ar);
                else
                    dw = (int) (dh * ar);
                break;
            case SURFACE_ORIGINAL:
                dh = mVideoHeight;
                dw = mVideoWidth;
                break;
        }

        surfaceHolder.setFixedSize(mVideoWidth, mVideoHeight);
        LayoutParams lp = surfaceView.getLayoutParams();
        lp.width = dw;
        lp.height = dh;
        surfaceView.setLayoutParams(lp);
        surfaceView.invalidate();
    }
    
	@Override
	public void surfaceChanged(SurfaceHolder holder, int format, int width,
			int height) {
		mLibVLC.attachSurface(holder.getSurface(), VLCDemoActivity.this, width, height);
	}

	@Override
	public void surfaceCreated(SurfaceHolder holder) {
	}

	@Override
	public void surfaceDestroyed(SurfaceHolder holder) {
		mLibVLC.detachSurface();
	}

	@Override
	public void onClick(View v) {
		if(mLibVLC != null) {
			try {
				String path = "/mnt/sdcard/movie/test.mp4";
				String pathUri = LibVLC.getInstance().nativeToURI(path);
				mLibVLC.readMedia(pathUri, false);
			} catch (LibVlcException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
}

例程资源链接：（共3部分）

http://download.csdn.net/detail/laukaka/4824251

http://download.csdn.net/detail/laukaka/4839829

http://download.csdn.net/detail/laukaka/4824254