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

        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。