安卓屏幕超时

Question

我知道可以使用唤醒锁来保持屏幕、CPU 等的开启，但是如何以编程方式更改 Android 手机上的“屏幕超时”设置。

Answer 1

public class HelloWorld extends Activity 
{
    private static final int DELAY = 3000;
    int defTimeOut = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        // Be sure to call the super class.
        super.onCreate(savedInstanceState);

        // See assets/res/any/layout/hello_world.xml for this
        // view layout definition, which is being set here as
        // the content of our screen.
        setContentView(R.layout.hello_world);
        defTimeOut = Settings.System.getInt(getContentResolver(), 
                         Settings.System.SCREEN_OFF_TIMEOUT, DELAY);
        Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT, DELAY);
    }

    @Override
    protected void onDestroy() 
    {
        super.onDestroy();
        Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT, defTimeOut);
    }
}

并且不要忘记在清单中添加此权限：

android:name="android.permission.WRITE_SETTINGS"

Answer 2

以上是正确的：

Settings.System.putInt(getContentResolver(),Settings.System.SCREEN_OFF_TIMEOUT, DELAY); 

但还要在清单中包含许可：

android:name="android.permission.WRITE_SETTINGS"

Answer 3

Settings.System 提供程序提供了 SCREEN_OFF_TIMEOUT 设置可能就是您正在寻找的设置。

Answer 4

这是一个代码表，您可以做更多。

long stand = Settings.System.getLong(
                        mContext.getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT,
                        -1);
                long sec = stand / 1000;
                String time = null;
                                    if(stand<0) {
                                         //close.
                                    }
                else if( sec >= 60) {//to minute
                    time = String.format(mContext.getString(R.string.minutes), (sec / 60) + "");
                } else {
                    time = String.format( mContext.getString(R.string.seconds),sec + "");
                }