来自相同字符串输入

时间:2015-12-22 19:26:24

标签: android linux input broadcastreceiver runtime.exec

我有一个BroadcastReceiver,它接收来自外部源的输入。

此接收器必须表现为“类似鼠标”的程序,并将输入事件发送到系统。我有Root访问权限。

我的问题是,当我发送"input tap 275 410"这样的字符串时,程序行为正常,如果我甚至拆分"input" + " tap" + " 275" + " 410"之类的字符串,它仍然有用......

但是,当我按照需要组装字符串时:

"input " + CursorSystem.command + " " + coords[0] + " " + coords[1]

然后没有任何反应......在调试时,所有观看的字符串都完全相同(减去位置):

value = {char[26]@830031306976}  0 = 'i' 105 1 = 'n' 110 2 = 'p' 112 3 = 'u' 117 4 = 't' 116 5 = ' ' 32 6 = 't' 116 7 = 'a' 97 8 = 'p' 112 9 = ' ' 32 10 = '2' 50 11 = '7' 55 12 = '5' 53 13 = ' ' 32 14 = '4' 52 15 = '1' 49 16 = '0' 48 17 = '\u0000' 0 18 = '\u0000' 0 19 = '\u0000' 0 20 = '\u0000' 0 21 = '\u0000' 0 22 = '\u0000' 0 23 = '\u0000' 0 24 = '\u0000' 0 25 = '\u0000' 0

我想要一些指导或财产来学习,因为我的结果没有效果。据我所知,这不是一个权限问题,也不是一个线程问题,因为Logs显示了权限请求(和授权),只要Receiver正在执行,该线程就会存在(但如果我调试它太久了,然后它会在一段时间后被杀死[30+秒])

  

Receiver.onReceive:

public void onReceive(Context context, Intent intent) {
    String command = intent.getStringExtra("command");
    String touch = intent.getStringExtra("touch");
    if (Executor.isRootAvailable()) {
        Executor executor = new Executor();
        ArrayList<String> commands = new ArrayList<>();
        if (command != null) {
            if (command.length() > 0) {
                if (commands.add("input " + command)) {
                    executor.execute(commands);
                }
            }
        } else if (touch != null) {
            if (CursorSystem.isAlive) { // Always true for the executions
                CursorSystem.doInput();
                if (CursorSystem.state == CursorSystem.STATE) { // Always true for the executions
                    int[] coords = CursorSystem.coordinates;
                    if (coords != null) {
// This line is where (I guess) that the problem lies.
// CursorSystem.command is "tap", coords[0] and coords[1] is the result of (a view).getLocationOnScreen(coordinates)
// It results in a 2 positions int array with (x, y) coordinates, these values are always correct.
                        if (commands.add("input " + CursorSystem.command + " " + coords[0] + " " + coords[1])) {
                            executor.execute(commands);
                            CursorSystem.doInput();
                        } else {
                            // error...
                        }
                    } else {
                        // error...
                    }
                } else {
                    // error...
                }
            } else {
                error...
            }
        } else {
            error...
        }
    } else {
        error...
    }
}
  

Executor.execute:

public final boolean execute(ArrayList<String> commands) {
    boolean resp = false;
    try {
        if (commands != null && commands.size() > 0) {
            Process suProcess = Runtime.getRuntime().exec("su");
            DataOutputStream dataOutputStream = new DataOutputStream(suProcess.getOutputStream());
            for (String currCommand : commands) {
                dataOutputStream.writeBytes(currCommand);
                dataOutputStream.writeBytes("\n");
                dataOutputStream.flush();
            }
            dataOutputStream.writeBytes("exit\n");
            dataOutputStream.flush();
            try {
                int suProcessRetval = suProcess.waitFor();
                return (suProcessRetval != 255); // Always yields 0
            } catch (Exception ex) {
                // errors...
            }
        } else {
            // error...
        }
    } catch (IOException ex) {
        Log.w(TAG, "IOException: ", ex);
    } catch (SecurityException ex) {
        Log.w(TAG, "SecurityException: ", ex);
    } catch (Exception ex) {
        Log.w(TAG, "Generic Exception: ", ex);
    }
    return resp;
}

2 个答案:

答案 0 :(得分:3)

对任何有兴趣的人:

发现的问题是CursorSystem使用了ImageViews,它帮助用户“瞄准”#34;需要什么样的互动(以及在哪里)。在执行期间,可以接收命令,并将图像移动到命令发生的位置,从而接收&#34;接收&#34;事件。

添加以下标志:

.LayoutParams.FLAG_NOT_FOCUSABLE
.LayoutParams.FLAG_NOT_TOUCHABLE
.LayoutParams.FLAG_LAYOUT_NO_LIMITS

允许系统不将视图视为可交互的,以及&#34; draw&#34;他们超出界限,以便用户可以轻扫&#34;设备隐藏菜单,以及单击可能不存在的目标。这导致一些&#34; Launcher&#34;拦截MotionEvent的程序,什么都不做。

命令正在成功执行,没有显示结果,导致我们将其解释为&#34;什么都不做&#34;。

答案 1 :(得分:-1)

替换

 if (commands.add("input " + CursorSystem.command + " " + coords[0] + " " + coords[1])) {
                            executor.execute(commands);
                            CursorSystem.doInput();
                        }

String newCommand = "input " + CursorSystem.command + " " + coords[0] + " " + coords[1];
newCommand = newCommand.replace("\u0000", "").replace("\\u0000", "");// removes NUL chars and backslash+u0000
if(commands.add(newCommand)){
   executor.execute(commands);
   CursorSystem.doInput();
   }