http://developer.android.com/reference/android/app/DialogFragment.html#AlertDialog

但是作为一个新的Android / Java学习者,通过编写一个简单的警报对话框可以看到2个选项(是/否)消息弹出的代码量并不容易.

以下是我在MainActivity文件中的代码：

final private int RESET_DIALOG = 0;
 
    private OnClickListener resetButtonListener = new OnClickListener() {
 
        @Override
        public void onClick(View v) {
            showDialog(RESET_DIALOG);
 
        }
    };
 
    protected android.app.Dialog onCreateDialog(int id) {
        switch(id) {
        case RESET_DIALOG: 
            AlertDialog.Builder builder = new Builder(this);
            return builder
                    .setMessage("Are you sure you want to reset the count?")
                    .setNegativeButton("No",new DialogInterface.OnClickListener() {    
 
                        @Override
                        public void onClick(DialogInterface arg0,int arg1) {
                            Toast.makeText(MainActivity.this,"Did not reset!",5).show();
 
                        }
                    })
 
                    .setPositiveButton("Yes",new DialogInterface.OnClickListener() {
 
 
                        @Override
                        public void onClick(DialogInterface arg0,"Did Reset!",5).show();
 
                        }
                    })
                    .create();
        }
        return null;
    };

这是我尝试按照Android网站上的说明进行操作：主要活动文件：

final private int RESET_DIALOG = 0;
 
    private OnClickListener resetButtonListener = new OnClickListener() {
 
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(MainActivity.this,MainDialog.class);
            startActivity(intent);
 
        }
    };
 
    protected android.app.Dialog onCreateDialog(int id) {
        switch(id) {
        case RESET_DIALOG: 
            AlertDialog.Builder builder = new Builder(this);
            return builder
                    .setMessage("Are you sure you want to reset the count?")
                    .setNegativeButton("No",5).show();
 
                        }
                    })
                    .create();
        }
        return null;
    };

然后创建一个MainDialog类：(我实际上失去了如何正确地做这个或应用它)

package com.proteintracker;
 
import android.support.v4.app.DialogFragment;
 
public class MainDialog extends DialogFragment {
    public static MyAlertDialogFragment newInstance(int title) {
        MyAlertDialogFragment frag = new MyAlertDialogFragment();
        Bundle args = new Bundle();
        args.putInt("title",title);
        frag.setArguments(args);
        return frag;
    }
}

我不知道我是否假设为片段创建一个新类,以及如何将它应用到活动屏幕中的当前对话框中.