自由手記

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AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
        builder.setMessage("是否登出?")
          .setPositiveButton("是", new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int which) {
            // 左方按鈕方法
            settings.edit().putString("login", "No").commit();
           }
          })
          .setNegativeButton("否", new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int which) {
            // 右方按鈕方法
          
           }
          });
        AlertDialog logout_dialog = builder.create();
        logout_dialog.show();