做项目的时候，涉及到一个注销登录的过程，这时候需要关闭之前打开的所有Activity。仅finish当前Activity显然是不够的。我实践过的方法有两种：
1、基础类BaseActivity中注册广播接收器，接受关闭所有Activity的广播
2、基础类BaseActivity中将Activity加入一个集合中，并提供一个静态finishAll的方法统一关闭
public class ExitAppReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals("exit_app")){
if (context != null){
Log.i("exit_app", "onReceive: class = "+context.getClass().getName());
if (context instanceof Activity){
((Activity)context).finish();
}
if (context instanceof Service){
((Service)context).stopSelf();
}
}
}
}
}
public class BaseActivity extends AppCompatActivity {
private static final String TAG = "BaseActivity";
private ExitAppReceiver exitAppReceiver;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
registerExitAppReceiver();//注册
}
@Override
protected void onDestroy() {
super.onDestroy();
unRegisterExitAppReceiver();//销毁
}
private void registerExitAppReceiver(){
IntentFilter filter = new IntentFilter();
filter.addAction("exit_app");
exitAppReceiver = new ExitAppReceiver();
registerReceiver(exitAppReceiver, filter);
}
private void unRegisterExitAppReceiver(){
unregisterReceiver(exitAppReceiver);
}
}
发送关闭所有Activity广播：
Intent intent = new Intent("exit_app");
sendBroadcast(intent);
2、采用ActivityCollector（方法参考郭霖《第一行代码》）
ActivityCollector源码
public class ActivityCollector {
public static List<Activity> list = new ArrayList<>();
public static void addActivity(Activity activity){
list.add(activity);
}
public static void removeActivity(Activity activity){
list.remove(activity);
}
public static void finishAllActivity(){
for (Activity activity :list) {
if (!activity.isFinishing()){
activity.finish();
}
}
}
}
在BaseActivity中添加和移除：
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActivityCollector.addActivity(this);
}
@Override
protected void onDestroy() {
super.onDestroy();
ActivityCollector.removeActivity(this);
}