Question

我开发了一个应用程序并将其转换为系统应用程序。在这个应用程序中，我想要更改三个全局变量：window，Window和ANIMATOR_DURATION_SCALE。但是在我通过我的应用程序修改valuein后，我必须再次输入设置（这是谷歌开发的系统应用程序）应用程序以使修改工作，否则修改将无效。这是我的代码：

WINDOW_ANIMATION_SCALE

检查Switch时，我修改了MainActivity中的值

TRANSITION_ANIMATION_SCALE

并且日志显示代码已成功修改该值。

Answer 1

使用此＆＃34;设置app magic＆＃34; （original taken from AOSP source）立即查看更改：

SystemPropPoker().execute()

同时添加此课程

class SystemPropPoker extends AsyncTask<Void, Void, Void> {

private static final String TAG = SystemPropPoker.class.getName();

@SuppressWarnings("unchecked")
@Override
protected Void doInBackground(@NonNull Void... params) {
    String[] services;
    try {
        Class serviceManagerClass = Class.forName("android.os.ServiceManager");
        Method listServicesMethod = serviceManagerClass.getMethod("listServices");
        services = (String[]) listServicesMethod.invoke(null);
        for (String service : services) {
            Method checkServiceMethod = serviceManagerClass.getMethod("checkService", String.class);
            IBinder obj = (IBinder) checkServiceMethod.invoke(null, service);
            if (obj != null) {
                Parcel data = Parcel.obtain();
                final int SYSPROPS_TRANSACTION = ('_'<<24)|('S'<<16)|('P'<<8)|'R'; //copy from source code in android.os.IBinder.java
                try {
                    obj.transact(SYSPROPS_TRANSACTION, data, null, 0);
                } catch (Exception e) {
                    Log.i(TAG, "Someone wrote a bad service '" + service
                            + "' that doesn't like to be poked: " + e);
                }
                data.recycle();
            }
        }
    } catch (ClassNotFoundException | NoSuchMethodException | InvocationTargetException | IllegalAccessException e) {
        e.printStackTrace();
    }
    return null;
}

参考：How to easily "Show Layout bounds" for Android debugging?

Settings.Global.putInt（）不能立即工作

1 个答案: