Question

安卓开发问题：button 的click 事件 和dialog 的click事件 怎么才能共存于MainActivity的这个类里面。

MainActivity 里面使用了一个Button 和一个Dialog ，现在要为他们添加事件方法，问题就出在分别为Button和Dialog 引入OnClickListener 的这两个包上面，引入的包只有一个能起作用，就是哪个排在最前就哪个包起作用，所button和dialog 添加的事件至少有一个会报错。请问有经验的大神这个该怎么解决啊？
代码如下：
package com.example.dialogdemo;
import android.view.View.OnClickListener;
import android.content.DialogInterface.OnClickListener;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity
{
EditText edit;
Button sendBu;
protected void onCreate(Bundle savedInstanceState)
{

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
edit=(EditText)findViewById(R.id.edittext);
sendBu=(Button)findViewById(R.id.button1);
sendBu.setOnClickListener(new OnClickListener(){

{

dialog();

}
});

}

public void dialog()
{
AlertDialog.Builder builder = new Builder(MainActivity.this);

builder.setTitle("确认发送！");
builder.setMessage("是否发送这条消息？");
builder.setPositiveButton("确认发送", new OnClickListener(){

public void onClick(DialogInterface dialog,int which)
{

dialog.dismiss();
}
});

builder.setNegativeButton("取消发送", new OnClickListener(){

public void onClick(DialogInterface dialog,int which)
{

dialog.dismiss();

}
});
}
}

Answer 1

用得着这么麻烦

builder.setNegativeButton("确定", new DialogInterface.OnClickListener() {
     
     @Override
     public void onClick(DialogInterface dialog, int which) {
      // TODO Auto-generated method stub
      
     }
    });
    builder.setPositiveButton("取消", new DialogInterface.OnClickListener() {
     
     @Override
     public void onClick(DialogInterface dialog, int which) {
      // TODO Auto-generated method stub
      
     }
    });

这样就行了，dialog.dissmiss()也不用调，注意是 DialogInterface.OnClickListener

Answer 2

package com.hw.dialog;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity implements OnClickListener{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

Button bt_1 = (Button) findViewById(R.id.bt_1);
Button bt_2 = (Button) findViewById(R.id.bt_2);
Button bt_3 = (Button) findViewById(R.id.bt_3);
Button bt_4 = (Button) findViewById(R.id.bt_4);

bt_1.setOnClickListener(this);
bt_2.setOnClickListener(this);
bt_3.setOnClickListener(this);
bt_4.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.bt_1:
bt1();
break;
case R.id.bt_2:
bt2();
break;
case R.id.bt_3:
bt3();
break;
case R.id.bt_4:
bt4();
break;
default :
break;
}
}
private void bt4() {
// TODO Auto-generated method stub

}
private void bt3() {
// TODO Auto-generated method stub

}
private void bt2() {
// TODO Auto-generated method stub
}
private void bt1() {

//构建AlertDialog
AlertDialog.Builder builder = new Builder(MainActivity.this);
builder.setTitle("警告！");
builder.setMessage("世界上最遥远的距离是没有网络！");

builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
System.out.println("点击了确定按钮");
}
});

builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
System.out.println("点击了取消按钮");
}
});

//最后一步 一定要记得show出来
builder.show();
}

}