android 实现息屏亮屏 Runtime.getRuntime().exec不执行

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        公司想实现远程息屏亮屏。试了下PowerManager，对我这个广告屏来讲是没有效果的。

import android.content.Context;
import android.os.PowerManager;public class ScreenStateHelper {private PowerManager powerManager;private WakeLock wakeLock;public ScreenStateHelper(Context context) {powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);}public boolean isScreenOn() {return powerManager.isInteractive();}public void acquireWakeLock() {if (wakeLock != null) {wakeLock.release();}wakeLock = powerManager.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, "MyWakeLock");wakeLock.acquire();}public void releaseWakeLock() {if (wakeLock != null) {wakeLock.release();wakeLock = null;}}
}

然后想着是把亮度调成0，结果只是变得很暗，还是能看见界面：

public static void setScreenDark(Context context) {if (!Settings.System.canWrite(context)) {Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS);intent.setData(Uri.parse("package:" + context.getPackageName()));context.startActivity(intent);} else {Settings.System.putInt(context.getContentResolver(),Settings.System.SCREEN_BRIGHTNESS,0);}}

最后想着用adb命令试试：

        

adb shell input keyevent KEYCODE_POWER

发现是可以使用的，然后使用Runtime.getRuntime().exec("input keyevent KEYCODE_POWER")，发现死活没反应，设备也root了。后来发现需要su权限，然后就可以允许了，代码如下：

public static void executeADBCommands(boolean isRooted, String... commands) {Process process = null;BufferedReader successResult = null;BufferedReader errorResult = null;DataOutputStream os = null;try {process = Runtime.getRuntime().exec(isRooted ? "su" : "sh", null, null);os = new DataOutputStream(process.getOutputStream());for (String command : commands) {if (command == null) continue;os.write(command.getBytes());os.writeBytes(System.getProperty("line.separator"));os.flush();}os.writeBytes("exit" + System.getProperty("line.separator"));os.flush();int result = process.waitFor();} catch (Exception e) {e.printStackTrace();} finally {try {if (os != null) {os.close();}} catch (IOException e) {e.printStackTrace();}try {if (successResult != null) {successResult.close();}} catch (IOException e) {e.printStackTrace();}try {if (errorResult != null) {errorResult.close();}} catch (IOException e) {e.printStackTrace();}if (process != null) {process.destroy();}}}

调用的时候：

CommonUtils.executeADBCommands(true, "input keyevent KEYCODE_POWER");

这样就能做到息屏亮屏了。

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