按系统返回键处理

app/src/main/java/com/unionmed/unionmedtv/activity/HomeActivity.java

@@ -3,6 +3,7 @@ package com.unionmed.unionmedtv.activity;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.view.KeyEvent;
 import android.view.View;
 import android.widget.ImageView;
 import android.widget.TextView;
@@ -13,6 +14,7 @@ import androidx.lifecycle.Observer;
 import androidx.viewpager2.adapter.FragmentStateAdapter;
 import androidx.viewpager2.widget.ViewPager2;
 
+import com.blankj.utilcode.util.ToastUtils;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.request.RequestOptions;
 import com.lxj.xpopup.XPopup;
@@ -131,4 +133,21 @@ public class HomeActivity extends BaseActivity implements View.OnFocusChangeList
             AddressSelectActivity.StartActivity(HomeActivity.this);
         }
     }
+
+    private long exitTime = 0;
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        if (keyCode == KeyEvent.KEYCODE_BACK) {
+            if (System.currentTimeMillis() - exitTime > 2000) {
+                ToastUtils.showLong("在按一次退出程序");
+                exitTime=System.currentTimeMillis();
+            } else {
+                finish();
+                System.exit(0);
+            }
+            return false;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
 }

app/src/main/java/com/unionmed/unionmedtv/login/activity/LoginActivity.java

@@ -65,6 +65,7 @@ public class LoginActivity extends FragmentActivity {
         if (savedInstanceState == null) {
             if (CacheUtil.isLogin()) {
                 HomeActivity.StartActivity(LoginActivity.this);
+                finish();
             } else {
                 getSupportFragmentManager().beginTransaction()
                         .replace(R.id.main_browse_fragment, new LoginPhoneFragment())

app/src/main/java/com/unionmed/unionmedtv/login/activity/fragment/LoginAccountFragment.java

@@ -193,6 +193,7 @@ public class LoginAccountFragment extends Fragment implements View.OnClickListen
                             if (personInfoBeanHttpData.getData().getCode() == 200) {
                                 CacheUtil.saveUserToken(personInfoBeanHttpData.getData().getData().getUserToken());
                                 HomeActivity.StartActivity(getActivity());
+                                getActivity().finish();
                             } else {
                                 CacheUtil.setToken(null);
                                 ToastUtils.showLong(personInfoBeanHttpData.getMessage());

app/src/main/java/com/unionmed/unionmedtv/login/activity/fragment/LoginPhoneFragment.java

@@ -225,6 +225,7 @@ public class LoginPhoneFragment extends Fragment implements View.OnClickListener
                         if (personInfoBeanHttpData.isRequestSucceed()) {
                             CacheUtil.saveUserToken(personInfoBeanHttpData.getData().getUserToken());
                             HomeActivity.StartActivity(getActivity());
+                            getActivity().finish();
                         } else {
                             CacheUtil.setToken(null);
                             ToastUtils.showLong(personInfoBeanHttpData.getMessage());