1. 判断应用是否在最前端,前端直接将推送在页面显示,不在前端,推送到通知栏
public static boolean isForegroundDisplay(Context context) { String packageName = context.getPackageName(); ActivityManager am = (ActivityManager)context.getSystemService("activity"); List tasksInfo; if(VERSION.SDK_INT > 20) { tasksInfo = am.getRunningAppProcesses(); Iterator var4 = tasksInfo.iterator(); while(true) { RunningAppProcessInfo processInfo; do { if(!var4.hasNext()) { return false; } processInfo = (RunningAppProcessInfo)var4.next(); } while(processInfo.importance != 100); String[] var6 = processInfo.pkgList; int var7 = var6.length; for(int var8 = 0; var8 < var7; ++var8) { String activeProcess = var6[var8]; if(activeProcess.equals(packageName)) { return true; } } } } else { tasksInfo = am.getRunningTasks(1); if(tasksInfo.size() > 0 && packageName.equals(((RunningTaskInfo)tasksInfo.get(0)).topActivity.getPackageName())) { return true; } else { return false; } } }
2. 判断应用是否已经启动,是,直接调起界面,否,调起应用
//判断某一个类是否存在任务栈里面 public static boolean isExistMainActivity(Context context, Class<?> activity){ Intent intent = new Intent(context, activity); ComponentName cmpName = intent.resolveActivity(context.getPackageManager()); boolean flag = false; if (cmpName != null) { // 说明系统中存在这个activity ActivityManager am = (ActivityManager) context.getSystemService(ACTIVITY_SERVICE); List<ActivityManager.RunningTaskInfo> taskInfoList = am.getRunningTasks(10); //获取从栈顶开始往下查找的10个activity for (ActivityManager.RunningTaskInfo taskInfo : taskInfoList) { if (taskInfo.baseActivity.equals(cmpName)) { // 说明它已经启动了 flag = true; break; //跳出循环,优化效率 } } } return flag; }
Intent it = new Intent(context, Activity_Logo.class); it.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT); context.startActivity(it);
Intent it = new Intent(context, Activity_Logo.class); it.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP); it.putExtra(Activity_Logo.INTENT_AFTER_LOGO_KEY, JSONObject.toJSONString(pushMsgVo)); context.startActivity(it);
3. 调起界面的时候,经常会重新进入闪屏页,明明只需要调起
if (null != Manager_MyInfo.getInstance(this).getMyInfo() && (getIntent().getFlags() & Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT) != 0) { Log.i(TAG, "already started...... finished"); finish(); return; }
4. 应用启动,顺序A->B->C,唤起其他应用,当系统内存不足时,当前应用被杀掉,应用进程已经被杀掉了,在应用栈中存在,如果直接从栈点击,会先调起C,这个时候很可能和服务器的连接信息等已经不存在了,所以最好登录完成之后的界面都继承一个BaseActivity,如果判断到没有登录信息,没有用户信息,去重新进行登录,或者重新调转至闪屏页:Application中在用户登录完成之后设置User信息,没有User信息,说明当前进程是已经被杀掉的,直接跳转至登录页,注意登录页不需要继承BaseActivity中的判断
5. 推送当时调了半天,最后发现被VIVO手机坑了,没注意有个伸缩的箭头,点击的时候一直跳转到主页,后来才发现,点击那个伸缩的进行,才真正出现通知内容,点击时,才能调到对应debug内容