如何在Android平板电脑POWER按钮菜单中添加休眠功能

1、修改/frameworks/base/core/res/res/values/strings.xml

在此声明几个变量：

<string name="global_action_sleep">Sleep</string>  <string name="sleep">Sleep</string>  <string name="sleep_confirm">The machine screen will turn off.</string>

2、修改/frameworks/base/core/java/com/android/internal/app/ShutdownThread.java
要引用几个包
import android.os.SystemClock;

importandroid.os.PowerManager;
//添加屏幕待机方法 public static void goToSleep(Context context,long time){ context.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null); final AlertDialog dialog = new AlertDialog.Builder(context) .setIcon(android.R.drawable.ic_dialog_alert) .setTitle(com.android.internal.R.string.sleep) .setMessage(com.android.internal.R.string.sleep_confirm) .setPositiveButton(com.android.internal.R.string.yes, new DialogInterface.OnClickListener() { public void onClick (DialogInterface dialog, int which){ PowerManager pm = (PowerManager)mContext.getSystemService(Context.POWER_SERVICE); pm.goToSleep(SystemClock.uptimeMillis()); } }) .setNegativeButton(com.android.internal.R.string.no, null) .create(); dialog.getWindow().setType (WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG); dialog.getWindow().addFlags (WindowManager.LayoutParams.FLAG_BLUR_BEHIND); dialog.show(); }

3、修改 /frameworks/policies/base/mid/com/android/internal/policy/impl/GlobalActions.java
找到mItems = Lists.newArrayList，原始代码中定义了两个SinglePressAction，即为power按钮的菜单项，这时要在里面
增加一个SinglePressAction实现屏幕休眠功能的按钮，仿照原始代码
new SinglePressAction(com.android.internal.R.drawable.ic_lock_power_off, R.string.global_action_sleep){ public void onPress(){ ShutdownThread.goToSleep(mContext,SystemClock.uptimeMillis()); } public boolean showDuringKeyguard(){ return true; } public boolean showBeforeProvisioning(){ return true; } }

修改后重新编译，耐心等待后，在android-x86平台的平板电脑上测试可以实现电脑的休眠功能

注：本Blog转载自http://blog.sina.com.cn/hylinblog

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