我需要将一些Drawable资源导出到一个文件.
例如,我有一个函数返回给我一个Drawable对象.我想把它写到一个文件中/sdcard/drawable/newfile.png.我该怎么做？
我有一个mediacontroller的问题,这部分代码在不同的设备上完美无瑕作为Acer Liquid(姜饼),Archos 43(froyo)e Archos 32(froyo)......
VideoView videoView = (VideoView) findViewById(R.id.videoView1);
MediaController mediaController = new MediaController(this);
mediaController.setAnchorView(videoView);
File filevideo = new File(Environment.getExternalStorageDirectory() + "/edizionitsm/firenze/map_" + map_n + "/",filename + "_" + language + ".mp4");
Uri video = Uri.fromFile(filevideo);
videoView.setMediaController(mediaController);
videoView.setVideoURI(video);
videoView.start();
...但是在Point of View Pro Tab2(姜饼)上,它在活动开始时崩溃了.
11-09 14:12:59.640: E/AndroidRuntime(31433): FATAL EXCEPTION: main
11-09 14:12:59.640: E/AndroidRuntime(31433): java.lang.RuntimeException: Unable to start activity ComponentInfo{edizionitsm.archeoplayer/edizionitsm.archeoplayer.Player}: java.lang.NullPointerException
11-09 14:12:59.640: E/AndroidRuntime(31433): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
11-09 14:12:59.640: E/AndroidRuntime(31433): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
11-09 14:12:59.640: E/AndroidRuntime(31433): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
11-09 14:12:59.640: E/AndroidRuntime(31433): at …