前言：

项目需要实现session会话过期的功能，经过不断地调试，实现了该功能。下面我简单总结一下在客户端实现session会话过期的功能，希望对大家有所帮助！

需求：

Session会话过期，即5分钟会话到期时，用户退出应用程序。
以下四种情况需要弹出对话框提示：
1.App应用程序锁定 ; 
2.从其他应用程序活动又回到App设备 ; 
3.App应用程序不活动 ; 
4.Refresh_token过期(在拦截器处理，这里不做介绍)。
对话框有一个“OK”按钮的样式，单击“OK”用户将返回到登录页面。

思路：

1.在BaseActivity基类实现该功能，其他Activity继承BaseActivity即可。
2.在App应用程序初始化的时候，用CountTimer来处理。
3.当App应用程序锁定或者从其他应用程序活动又回到App设备，用BroadcastReceiver来处理。
4.App应用程序不活动时，重写dispatchTouchEvent，并处理。
5.弹出对话框提示用AlertDialog。

实现步骤：

1.App应用程序初始化的时候，添加CountTimer计时器。

@Override
protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);...//设置5分钟后会话过期 if(timeStart==0){countTimerView = new CountTimer(5 * 60 * 1000, 1000, BaseActivity.this);}}...
}@Override
protected void onResume() {super.onResume();timeStart();//开始计时
}@Override
protected void onPause() {super.onPause();if (countTimerView != null) {countTimerView.cancel();//当暂停的时候，要取消计时器}
}private void timeStart() {new Handler(getMainLooper()).post(new Runnable() { //重新开一条线程@Overridepublic void run() {if (countTimerView != null)countTimerView.start();//开始}});
}

2.当App应用程序锁定或者从其他应用程序活动又回到App设备，用BroadcastReceiver来处理。

@Override
protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);...//注册广播接收者registerReceiver(myReceiver, new IntentFilter(Intent.ACTION_SCREEN_ON));registerReceiver(myReceiver, new IntentFilter(Intent.ACTION_SCREEN_OFF));registerReceiver(myReceiver, new IntentFilter(Intent.ACTION_USER_PRESENT));...
}@Override
protected void onStart() {showLockScreenDialog();//调用onStart方法时，展示锁屏的dialogsuper.onStart();
}@Override
protected void onStop() {count--;if (count == 0) {timeStart = new Date().getTime(); //调用onStop方法时，开始计时}super.onStop();
}@Override
protected void onDestroy() {super.onDestroy();unregisterReceiver(myReceiver);//反注册
}private BroadcastReceiver myReceiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {if (Intent.ACTION_SCREEN_ON.equals(intent.getAction())) {//屏幕亮起来}if (Intent.ACTION_SCREEN_OFF.equals(intent.getAction())) { //锁屏}if (Intent.ACTION_USER_PRESENT.equals(intent.getAction()) && isDialogClose == 0) {//解锁showLockScreenDialog();}}
};private void showLockScreenDialog() {if (count == 0) {long timeEnd = new Date().getTime();if (timeStart != 0 && timeEnd - timeStart >= 5 * 60 * 1000) { //5分钟会话过期，弹出对话框if (countTimerView != null) {countTimerView.showSessionDialog();//Show session dialog}         }}count++;
}

3.App应用程序不活动时，重写dispatchTouchEvent，并处理。

@Override
public boolean dispatchTouchEvent(MotionEvent ev) {switch (ev.getAction()) {     case MotionEvent.ACTION_UP://弹起if (countTimerView != null)countTimerView.start();//开始计时break;case MotionEvent.ACTION_DOWN://按下View v = getCurrentFocus();if (isShouldHideInput(v, ev)) {hideSoftInput(v.getWindowToken());}if (countTimerView != null)countTimerView.cancel();//取消计时器timeStart=0;break;default:if (countTimerView != null)countTimerView.cancel();//取消计时器timeStart=0;break;}return super.dispatchTouchEvent(ev);
}

4.在BaseActivity实现的完整代码。

public abstract class BaseActivity extends AppCompatActivityimplements IUIOperation, BaseView {...@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);...//5分钟会话过期if(timeStart==0){   countTimerView = new CountTimer(5 * 60 * 1000, 1000, BaseActivity.this);}//注册广播接收者registerReceiver(myReceiver, new IntentFilter(Intent.ACTION_SCREEN_ON));registerReceiver(myReceiver, new IntentFilter(Intent.ACTION_SCREEN_OFF));registerReceiver(myReceiver, new IntentFilter(Intent.ACTION_USER_PRESENT));...}@Overrideprotected void onStart() {showLockScreenDialog();//调用onStart方式时,弹出对话框super.onStart();}@Overrideprotected void onResume() {super.onResume();timeStart();//开始计时}@Overrideprotected void onPause() {super.onPause();if (countTimerView != null) {countTimerView.cancel();//取消计时器}}@Overrideprotected void onStop() {count--;if (count == 0) {timeStart = new Date().getTime();//调用onStop方法时,开始计时}if (isDialogClose == 1) {if (mPDialog != null) {mPDialog.dismiss();mPDialog = null;}if (dialog != null) {dialog.dismiss();dialog = null;}if (dialog2 != null) {dialog2.dismiss();dialog2 = null;}}super.onStop();}@Overrideprotected void onDestroy() {super.onDestroy();...unregisterReceiver(myReceiver);//反注册}private void timeStart() {new Handler(getMainLooper()).post(new Runnable() {//新开一条线程@Overridepublic void run() {if (countTimerView != null)countTimerView.start();//开始计时}});}@Overridepublic boolean dispatchTouchEvent(MotionEvent ev) {switch (ev.getAction()) {case MotionEvent.ACTION_UP: //弹起if (countTimerView != null)countTimerView.start(); //开始计时break;case MotionEvent.ACTION_DOWN: //按下View v = getCurrentFocus();if (isShouldHideInput(v, ev)) {hideSoftInput(v.getWindowToken());}if (countTimerView != null)countTimerView.cancel(); //取消计时timeStart=0;//将计时器置为0break;default:if (countTimerView != null)countTimerView.cancel(); //取消计时timeStart=0;//将计时器置为0break;}return super.dispatchTouchEvent(ev);}private boolean isShouldHideInput(View v, MotionEvent event) {if (v != null && (v instanceof EditText)) {int[] l = {0, 0};v.getLocationInWindow(l);int left = l[0], top = l[1], bottom = top + v.getHeight(), right = left+ v.getWidth();if (event.getX() > left && event.getX() < right&& event.getY() > top && event.getY() < bottom) {// Click on the EditText event and ignore it.return false;} else {return true;}}return false;}private void hideSoftInput(IBinder token) {if (token != null) {InputMethodManager im = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);im.hideSoftInputFromWindow(token,InputMethodManager.HIDE_NOT_ALWAYS);}}//计时器的类class CountTimer extends CountDownTimer {private Context context;public CountTimer(long millisInFuture, long countDownInterval, Context context) {super(millisInFuture, countDownInterval);this.context = context;}@Overridepublic void onFinish() {showSessionDialog();//弹出对话框}@Overridepublic void onTick(long millisUntilFinished) {}//自定义对话框private void showSessionDialog() {AlertDialog.Builder builder = new AlertDialog.Builder(context);View view = LayoutInflater.from(context).inflate(R.layout.common_session_dialog, null);try {builder.setView(view);TextView tvContent = (TextView) view.findViewById(R.id.tv_content);Button btnOk = (Button) view.findViewById(R.id.btn_ok);//Introducing a custom font style.tvContent.setTypeface(Const.font300);btnOk.setTypeface(Const.font700);builder.setCancelable(false);dialog = builder.create();dialog.setCanceledOnTouchOutside(false);dialog2 = builder.show();btnOk.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {GotoLoginActivity(context); //会话过期，要求用户直接登录isDialogClose = 1;}});} catch (Exception e) {e.printStackTrace();}}private void GotoLoginActivity(Context context) {Intent intent = new Intent(context, LoginActivity.class);context.startActivity(intent);//返回登录页面AppManager.getInstance().finishOthersActivity(LoginActivity.class);        }}private BroadcastReceiver myReceiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {if (Intent.ACTION_SCREEN_ON.equals(intent.getAction())) {//屏幕亮起来}if (Intent.ACTION_SCREEN_OFF.equals(intent.getAction())) {//锁屏}if (Intent.ACTION_USER_PRESENT.equals(intent.getAction()) && isDialogClose == 0) {//解锁showLockScreenDialog();//弹出对话框}}};private void showLockScreenDialog() {if (count == 0) {long timeEnd = new Date().getTime();if (timeStart != 0 && timeEnd - timeStart >= 5 * 60 * 1000) {//5分钟会话过期               if (countTimerView != null) {countTimerView.showSessionDialog();//弹出对话框}                }}count++;}...}

5.总结：在项目中已经实现了session会话过期四种场景的需求。欢迎大家围观，多多指教！