通过adb获取task id

/**
 * 通过包名获取task id，不存在为-1
 *
 * @param packageName
 * @return
 */
public int getTaskId(String packageName) {
    String result = execRootCmd("dumpsys activity | grep " + packageName);

    int start = result.indexOf("TaskRecord{");
    if(start > 0){
        int end = result.indexOf("}", start);
        if(start < end){
            String taskStr = result.substring(start + 1, end);
            start = -1;
            end = -1;

            start = taskStr.indexOf("#");
            if (start > 0) {
                end = taskStr.indexOf(" ", start);
                if (start < end) {
                    String idStr = taskStr.substring(start + 1, end);
                    Log.d(TAG, "getTaskId:" + idStr);
                    if (isNumeric(idStr))
                        return Integer.parseInt(idStr);
                }
            }
        }
    }

    return -1;
}

exeRootCmd可以见http://www.sharezer.com/archives/1314