盒子升级apk

/** * 创建文件夹 * <p> * getFilesDir()不能使用安装目录，“解析程序包时出现问题” * Environment.getRootDirectory() 无法更改文件读写权限 * getCacheDir()不能再此目录创建文件，再放入apk,也会提示“解析程序包时出现问题” */public static String createFilePath(Context context, String s) {    String path;    if (isSdcard()) {        path = Environment.getExternalStorageDirectory() + "/YJY/Save/" + s + "/";        File file = new File(path);        if (!file.exists() && !file.isDirectory()) {            file.mkdirs();        }    } else {        path = context.getCacheDir() + "/";        File file = new File(path);        chmod("777", file.getAbsolutePath());        if (!file.exists() && !file.isDirectory()) {            file.mkdirs();        }    }    return path;}/** * 修改apk权限 */public static void chmod(String permission, String path) {    try {        String command = "chmod " + permission + " " + path;        Runtime runtime = Runtime.getRuntime();        runtime.exec(command);    } catch (IOException e) {        Log.e("akui", "修改apk权限失败");    }}/** * 是否存在sdcard */public static boolean isSdcard() {    try {        return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);    } catch (Exception e) {        e.printStackTrace();    }    return false;}/** * 打开文件进行安装 */public static void openFiles(Context context, File file) {    chmod("777", file.getAbsolutePath());    Intent intent = new Intent(Intent.ACTION_VIEW);    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);    intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");    context.startActivity(intent);}

获取文件路径

Environment.getDataDirectory() = /data
Environment.getDownloadCacheDirectory() = /cache
Environment.getExternalStorageDirectory() = /mnt/sdcard
Environment.getExternalStoragePublicDirectory(“test”) = /mnt/sdcard/test
Environment.getRootDirectory() = /system
getPackageCodePath() = /data/app/com.my.app-1.apk
getPackageResourcePath() = /data/app/com.my.app-1.apk
getCacheDir() = /data/data/com.my.app/cache
getDatabasePath(“test”) = /data/data/com.my.app/databases/test
getDir(“test”, Context.MODE_PRIVATE) = /data/data/com.my.app/app_test
getExternalCacheDir() = /mnt/sdcard/Android/data/com.my.app/cache
getExternalFilesDir(“test”) = /mnt/sdcard/Android/data/com.my.app/files/test
getExternalFilesDir(null) = /mnt/sdcard/Android/data/com.my.app/files
getFilesDir() = /data/data/com.my.app/files