Android App中连续点击Back键退出应用
发布时间:2020-12-14 23:18:19 所属栏目:Java 来源:网络整理
导读:今天PHP站长网 52php.cn把收集自互联网的代码分享给大家,仅供参考。 public class DoubleClickExitApp { private Context mcontext; /**是否是再次点击back键*/ private boolean isOnKeyBack; private Handler mHandler;
以下代码由PHP站长网 52php.cn收集自互联网 现在PHP站长网小编把它分享给大家,仅供参考 public class DoubleClickExitApp { private Context mcontext; /**是否是再次点击back键*/ private boolean isOnKeyBack; private Handler mHandler; /**退出提示Toast*/ private Toast mExitToast; public DoubleClickExitApp(Context context) { this.mcontext = context; this.mHandler = new Handler(Looper.getMainLooper()); } /**所在Activity中的点击返回事件处理*/ public boolean onKeyDown(int keyCode,KeyEvent event) { if(keyCode != KeyEvent.KEYCODE_BACK) {//如果不是点击的返回键,则返回false return false; } if(isOnKeyBack) { mHandler.removeCallbacks(onBackExitRunnable); if(mExitToast != null){ mExitToast.cancel(); } /**直接退出*/ AppManager.getAppManager().AppExit(mcontext); return true; } else { isOnKeyBack = true; if(mExitToast == null) { mExitToast = Toast.makeText(mcontext,"再按一次返回键退出应用",Toast.LENGTH_SHORT); } mExitToast.show(); mHandler.postDelayed(onBackExitRunnable,2000); return true; } } private Runnable onBackExitRunnable = new Runnable() { @Override public void run() { isOnKeyBack = false; if(mExitToast != null){ mExitToast.cancel(); } } }; } 然后在对应的Activity或是主页面中直接调用: public class MainActivity extends Activity{ private DoubleClickExitApp mDoubleClickExitApp; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mDoubleClickExitApp = new DoubleClickExitApp(this); } @Override protected void onDestroy() { super.onDestroy(); } /**在处理onKeyDown事件中调用我们写的工具类方法就可以*/ @Override public boolean onKeyDown(int keyCode,KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { return mDoubleClickExitApp.onKeyDown(keyCode,event); }else{ return super.onKeyDown(keyCode,event); } } 以上内容由PHP站长网【52php.cn】收集整理供大家参考研究 如果以上内容对您有帮助,欢迎收藏、点赞、推荐、分享。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |