无法重新启用KeyGaurd一旦停用它 [英] Could not re-enable the KeyGaurd once disabled it

问题描述

下面我有code写的使用切换按钮来切换 KeyGaurd 我的Andr​​oid手机。但我面临着一个奇怪的现象。

I have write below code to toggle the KeyGaurd of my android phone using a toggle button. but I am facing an strange behavior.

• 它会禁用 keygaurd 成功，但。不重新启用。

• it disables the keygaurd successfully but. not re-enabling.

 btnToggleLock.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {

        if (btnToggleLock.isChecked()) {

            toast.cancel();
            toast.setText("Unlocked");
            toast.show();

            Log.i("Unlocked", "If");

            KeyguardManager myKeyGuard = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);

            KeyguardLock myLock = myKeyGuard
                    .newKeyguardLock(KEYGUARD_SERVICE);
            myLock.disableKeyguard();


        } else {

            toast.cancel();
            toast.setText("Locked");
            toast.show();

            KeyguardManager myKeyGuard = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
            KeyguardLock myLock = myKeyGuard
                    .newKeyguardLock(KEYGUARD_SERVICE);
            myLock.reenableKeyguard();

            Log.i("Locked", "else");

        }

    }
});

它会禁用 keygaurd 成功，但。不重新启用。

it disables the keygaurd successfully but. not re-enabling.

也是我米采用了android 2.2.1 motoralla里程碑。

also I m using android 2.2.1 motoralla milestone.

推荐答案

这里的问题是，你正在创建一个新的锁（KeyGuardLock）每次if语句执行时间。您可以禁用锁在创建它的第一次，但你必须重新启用的你禁用摆在首位，你不能创建一个新的锁。

The issue here is that you are creating a new Lock (KeyGuardLock) every time the "if" statement executes. You can disable a lock the first time when you create it but you must "reenable" the lock which you disabled in the first place, you cannot create a new one.

的解决方案是使该锁的onClickListener之外。即采取以下code出了如果声明并设置onClickListener之前声明它： -

The solution is to make the lock outside of the onClickListener. i.e. Take the following code out of the "if" statement and declare it before setting the onClickListener:-

KeyguardManager myKeyGuard = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
            KeyguardLock myLock = myKeyGuard
                    .newKeyguardLock(KEYGUARD_SERVICE);

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