android 再按一次退出程序和弹框

最新推荐文章于 2017-07-04 15:54:43 发布

原创最新推荐文章于 2017-07-04 15:54:43 发布 · 572 阅读

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App退出程序两种实现方式专栏收录该内容

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本文介绍了一种在Android应用中实现退出逻辑的方法，包括通过按键快速退出应用及使用对话框确认退出，增强了用户体验。

    /* (non-Javadoc) 退出程序
     * @see android.app.Activity#dispatchKeyEvent(android.view.KeyEvent)
     */
    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
       if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
                 this.exitApp();
                }
                return true;
              }
              return super.dispatchKeyEvent(event);

}

    /** 退出App程序
     * @param mActivity
     */
    private void exitApp( ) {
        // 判断2次点击事件时间
        if ((System.currentTimeMillis() - exitTime) > 2000) {
          Toast.makeText(mActivity, "再按一次退出程序", Toast.LENGTH_SHORT).show();
          exitTime = System.currentTimeMillis();
        } else {
            finish();
        }
      }

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以下是弹框样式退出

   @Override
    public void onBackPressed() {
        String exit_hint = getString(R.string.exit_app_hint);
        showExitQueryDialog(this, exit_hint);
    }

    private void showExitQueryDialog(Context c, String msg) {
        final Dialog dialog = new Dialog(c, R.style.DialogTheme);
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        dialog.setContentView(R.layout.custom_query_dialog);
        TextView msgView = (TextView) dialog.findViewById(R.id.message);
        msgView.setText(msg);

        TextView btnDlgOk = (TextView) dialog.findViewById(R.id.dlg_ok);
        TextView btnDlgCancel = (TextView) dialog.findViewById(R.id.dlg_cancel);
        // dialog.setOnCancelListener();
        btnDlgOk.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
                exitApplication();
            }
        });
        btnDlgCancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });
        dialog.show();
    }