Android 重置应用程序功能

Question

有什么方法可以实现清除应用程序中所有数据/文件/shared_preferences/数据库的功能。我需要 Android 应用设置中的“清除数据”按钮等功能。

有什么想法可以实现吗？

Answer 1

此链接可能对您有帮助
http://www.hrupin.com/2011/11/how-to-clear-user-data-in-your-android-application-programmatically

public class MyApplication extends Application {
private static MyApplication instance;

@Override
public void onCreate() {
    super.onCreate();
    instance = this;
}

public static MyApplication getInstance() {
    return instance;
}

public void clearApplicationData() {
    File cache = getCacheDir();
    File appDir = new File(cache.getParent());
    if (appDir.exists()) {
        String[] children = appDir.list();
        for (String s : children) {
            if (!s.equals("lib")) {
                deleteDir(new File(appDir, s));
                Log.i("TAG", "**************** File /data/data/APP_PACKAGE/" + s + " DELETED *******************");
            }
        }
    }
}

public static boolean deleteDir(File dir) {
    if (dir != null && dir.isDirectory()) {
        String[] children = dir.list();
        for (int i = 0; i < children.length; i++) {
            boolean success = deleteDir(new File(dir, children[i]));
            if (!success) {
                return false;
            }
        }
    }

    return dir.delete();
}