Android应用资源全面分析之五：原生资源

名称

assets

res/raw

访问准备

AssetManager assetManager = getResources().getAssets();

AssetManager assetManager = getAssets();

AssetManager assetManager=AssetManager.class.newInstance();

String rawfile=path+filename

R.raw.filename

文本文件(.txt)

 InputStream is = assetManager.open(rawfile);

 assetManager.close()

InputStream is = getResources().openRawResource(R.raw.file)

音频文件(.mp3)

AssetFileDescriptor afd = assetManager.openFd(rawfile);

MediaPlayer mPlayer =new MediaPlayer();

mPlayer.setDataSource(afd.getFileDescriptor(),afd.getStartOffset(), afd.getLength());

mPlayer.prepare();

mPlayer.start();

MediaPlayer mPlayer = MediaPlayer.create(context, R.raw.filename)

mPlayer.prepare();

mPlayer.start();

视频文件(.mp4)

AssetFileDescriptor afd = assetManager.openFd(rawfile);

MediaPlayer mPlayer =new MediaPlayer();

mPlayer.setDataSource(afd.getFileDescriptor(),afd.getStartOffset(), afd.getLength());

SurfaceHolder holder=surfaceView.getHolder()

holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);  

holder.addCallback(this)

 @Override    

 public void surfaceCreated(SurfaceHolder holder) {    

player.setDisplay(holder); 

player.prepareAsync();}

@Override    

 public void onPrepared(MediaPlayer player) {  

           player.start();}

String uriString = "android.resource://" + getPackageName() + "/" + R.raw.filename;

Uri uri = Uri.parse(uriString);

videoView.setVideoURI(uri);//为视频播放器设置视频路径

videoView.setMediaController(new MediaController(RawActivity.this));//显示控制栏

videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {

    @Override

    public void onPrepared(MediaPlayer mp) {

        videoView.start();//开始播放视频

    }

});

网页文件(.html)

 webView.loadUrl("file:///android_asset/rawfile");

webView.loadUrl("file:///android_res/raw/file");

sqlite数据库(.db)

 使用文本文件方法将其copy到/data/data/packageName下再访问

使用文本文件方法将其copy到/data/data/packageName下再访问

字体文件(.ttf)

Typeface tf = Typeface.createFromAsset(assetManager, "fonts/rawfile");

textview.setTypeface(tf);

字体文件通常直接放在res/font文件夹下：

Typeface tf = getResources().getFont(R.font.myfont);     

textview.setTypeface(tf);