Android APP database overflow clearing method

We usually integrate third-party SDK in the app. Sometimes, when the app is used for a long time, the database in the app will be too full, which leads to the application of CARsh. Then we have to think of a solution, the idea is as follows

1. Scan the SDK directory where the database is stored, which is the package name /data/data

2, and then from the subdirectory to find, if the db file is directly deleted

     /* Clear the cache database * * @desc clear it once a day */
    private void cleanDBData(a) {
        SharedPreferences sharedPreferences = getSharedPreferences("clear_data_recode", MODE_PRIVATE);
        String data = sharedPreferences.getString("date"."");
        String currentDate = DateUtils.date2String(System.currentTimeMillis());
        if (data.equals(currentDate)) {
            return;
        }
        String packageName = getPackageName();
        File fileRoot = new File("data/data/" + packageName);
        try {
            if (fileRoot.exists() || fileRoot.isDirectory()) {
                File[] files = fileRoot.listFiles();
                if (files == null) {
                    return;
                }
                for (int i = 0; i < files.length; i++) {
                    //Log.i("data_file",files[i].getName());
                    String name = files[i].getName();
                    if (("databases".equals(name) || "files".equals(name) && files[i].isDirectory())) {
                        File[] filesLast = files[i].listFiles();
                        if (filesLast == null) {
                            break;
                        }
                        for (File file : filesLast) {
                            // The file exists in a non-directory
                            if(file ! =null&& file.exists() && ! file.isDirectory() && file.getPath().contains(".db")) {
                                Log.i("data_file", file.getAbsolutePath() + ",size=" + file.length());
                                file.delete();
                            }
                        }
                        SharedPreferences spSave = getSharedPreferences("clear_data_recode", MODE_PRIVATE);
                        SharedPreferences.Editor editor = spSave.edit();
                        editor.putString("date", DateUtils.date2String(System.currentTimeMillis())); editor.commit(); }}}}catch(Exception e) { System.out.println(e.getMessage()); }}Copy the code