android 打开文件

Intent intent = new Intent();
intent.setAction(android.content.Intent.ACTION_VIEW);
File file = new File(\"/sdcard/test.mp4\");
intent.setDataAndType(Uri.fromFile(file), \"video/*\");
startActivity(intent);

Intent intent = new Intent();
intent.setAction(android.content.Intent.ACTION_VIEW);
File file = new File(\"/sdcard/test.mp3\");
intent.setDataAndType(Uri.fromFile(file), \"audio/*\");
startActivity(intent);