test main

app/src/main/java/com/oo/eye/activity/EyeTestMainActivity.java

 package com.oo.eye.activity;
 
 import android.content.Intent;
+import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.View;
 import android.widget.LinearLayout;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import com.app.baselibrary.base.common.BaseActivity;
 import com.app.baselibrary.commonUtil.BDttsUtils;
@@ -18,6 +20,8 @@ import com.oo.eye.db.DbManager;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Date;
+import java.util.Timer;
+import java.util.TimerTask;
 
 import butterknife.BindView;
 import butterknife.OnClick;
@@ -76,6 +80,41 @@ public class EyeTestMainActivity extends BaseActivity {
         isRequestFinish = false;
         ToastUtil.showLongMessage(msg);
     }
+    @Override
+    public boolean dispatchKeyEvent(KeyEvent event) {
+        if (event.getAction() == KeyEvent.ACTION_UP) {
+            LogUtil.e("---查看按键对应的数字---" + event.getKeyCode());
+            switch (event.getKeyCode()) {
+                case KeyEvent.KEYCODE_DEL://返回键
+                    exitBy2Click();
+                    return true;
+            }
+        }
+        return super.dispatchKeyEvent(event);
+    }
+    /**
+     * 双击退出函数
+     */
+
+    private static Boolean isExit = false;
+    private Timer tExit;
+    private void exitBy2Click() {
+
+        if (isExit == false) {
+            isExit = true; // 准备退出
+            ToastUtil.showMessage("再按一次退出程序");
+            tExit = new Timer();
+            tExit.schedule(new TimerTask() {
+                @Override
+                public void run() {
+                    isExit = false; // 取消退出
+                }
+            }, 2000); // 如果2秒钟内没有按下返回键，则启动定时器取消掉刚才执行的任务
+        } else {
+            finish();
+            System.exit(0);
+        }
+    }
 
     @Override
     public boolean dispatchTouchEvent(MotionEvent ev) {
@@ -112,4 +151,11 @@ public class EyeTestMainActivity extends BaseActivity {
                 break;
         }
     }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        tExit.cancel();
+        tExit=null;
+    }
 }

library/baselibrary/src/main/java/com/app/baselibrary/base/common/BaseActivity.java

@@ -5,11 +5,14 @@ import android.content.pm.ActivityInfo;
 import android.content.res.Configuration;
 import android.os.Bundle;
 import android.support.v4.content.ContextCompat;
+import android.view.KeyEvent;
 
 import com.app.baselibrary.BuildConfig;
 import com.app.baselibrary.R;
 import com.app.baselibrary.base.app.AppManager;
+import com.app.baselibrary.commonUtil.LogUtil;
 import com.app.baselibrary.commonUtil.StatusBarCompat;
+import com.app.baselibrary.commonUtil.ToastUtil;
 import com.tbruyelle.rxpermissions.RxPermissions;
 import com.trello.rxlifecycle.components.support.RxAppCompatActivity;
 import com.umeng.analytics.MobclickAgent;
@@ -157,23 +160,45 @@ public abstract class BaseActivity extends RxAppCompatActivity {
 
     /**
      * 画页是否存活
+     *
      * @return
      */
-    public boolean isActive(){
+    public boolean isActive() {
         return !isFinishing();
     }
 
     /**
      * 弹出加载对话框
      */
-    public void showLoadingDialog(){
+    public void showLoadingDialog() {
 
     }
 
     /**
      * 关闭加载对话框
      */
-    public void closeLoadingDialog(){
+    public void closeLoadingDialog() {
+
+    }
+
+    private long mLastOnKeyTime = -1;
 
+    @Override
+    public boolean dispatchKeyEvent(KeyEvent event) {
+        if (event.getAction() == KeyEvent.ACTION_UP) {
+            //两次点击大于1秒
+            long currentTime = System.currentTimeMillis();
+            if (mLastOnKeyTime > 0 && currentTime - mLastOnKeyTime < 500) {
+                return true;
+            }
+            mLastOnKeyTime = currentTime;
+            LogUtil.e("---查看按键对应的数字---" + event.getKeyCode());
+            switch (event.getKeyCode()) {
+                case KeyEvent.KEYCODE_DEL://返回键
+                    finish();
+                    return true;
+            }
+        }
+        return super.dispatchKeyEvent(event);
     }
 }