android 验证二

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    xmlns:tools="http://schemas.android.com/tools"  
    android:layout_width="fill_parent"  
    android:layout_height="match_parent"  
    android:orientation="vertical"  
    tools:context=".MainActivity" >  
      
     <TextView  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:id="@+id/name"    
        android:text="姓名:"/>  
    <EditText android:id="@+id/editText_name"   
        android:layout_width="fill_parent"  
        android:layout_height="wrap_content"  
        android:hint="请输入文本信息"  
        />  
      
    <TextView  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:id="@+id/age"    
        android:text="年龄:"/>  
      
     <EditText android:id="@+id/editText_age"  
         android:layout_height="wrap_content"  
         android:layout_width="fill_parent"  
         android:hint="请输入年龄"/>  
  
    <Button android:id="@+id/btnSubmit"  
        android:layout_height="wrap_content"  
        android:layout_width="wrap_content"  
        android:text="提交验证"/>  
</LinearLayout>  

package com.example.fourandroid;  
  
import android.annotation.SuppressLint;  
import android.app.Activity;  
import android.app.AlertDialog;  
import android.content.DialogInterface;  
import android.os.Bundle;  
import android.view.View;  
import android.view.View.OnClickListener;  
import android.widget.Button;  
import android.widget.EditText;  
import android.widget.Toast;  
  
@SuppressLint("ShowToast")  
public class MainActivity extends Activity {  
    private EditText editText_name;  
    private EditText editText_age;  
    private Button btnSubmit;  
      
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        super.setContentView(R.layout.activity_main);  
          
        //获取组件信息;  
        this.editText_name = (EditText) super.findViewById(R.id.editText_name);  
        this.editText_age = (EditText)super.findViewById(R.id.editText_age);  
          
        //给按钮设置单击事件;  
        this.btnSubmit = (Button)super.findViewById(R.id.btnSubmit);  
        this.btnSubmit.setOnClickListener(new myBtnSubmitImpl());  
    }  
  
    public class myBtnSubmitImpl implements OnClickListener{  
        @Override  
        public void onClick(View v) {  
            boolean bol = true;  
              
            String age = MainActivity.this.editText_age.getText().toString();  
            String name = MainActivity.this.editText_name.getText().toString();  
            //实例化对话框;  
            AlertDialog.Builder builder = new AlertDialog.Builder(v.getContext());  
            builder.setTitle("提示信息");  
              
            //判断name是否为空;  
            if(name == null || name.trim().length() == 0 || "".equals(name.trim())){  
                builder.setMessage("Name不能为空，请输入信息.");  
                builder.setPositiveButton("确认", new DialogInterface.OnClickListener(){  
                    @Override  
                    public void onClick(DialogInterface dialog, int which) {  
                        setResult(RESULT_OK);   
                    }  
                });  
                  
                //设置焦点信息;  
                MainActivity.this.editText_name.setFocusable(true);  
                MainActivity.this.editText_name.setFocusableInTouchMode(true);  
                MainActivity.this.editText_name.requestFocus();  
                MainActivity.this.editText_name.requestFocusFromTouch();  
                builder.show();  
                //标识此文本框属性为空;  
                bol = false;  
                return;  
            }  
              
            //判断address是否为空;  
            if(age == null || "".equals(age) || age.trim().length() == 0){  
                builder.setMessage("Age不能为空，请输入信息.");  
                //给对话框增加一个确定按钮;  
                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {   
                    //监听单击事件;  
                    public void onClick(DialogInterface dialog, int whichButton) {   
                        setResult(RESULT_OK);//确定按钮事件 ;  
                    }   
                }) ;  
                  
                //设置address焦点;  
                MainActivity.this.editText_age.setFocusable(true);  
                MainActivity.this.editText_age.setFocusableInTouchMode(true);  
                MainActivity.this.editText_age.requestFocus();  
                MainActivity.this.editText_age.requestFocusFromTouch();  
                  
                //显示提示框;  
                builder.show();  
                //标识此文本框属性为空;  
                bol = false;  
                return;  
            }  
              
            if(bol){  
                //设置提示信息.  
                Toast.makeText(MainActivity.this, "恭喜你,验证成功", Toast.LENGTH_LONG).show();  
            }  
        }  
    }  
}