Android 笔记 a+b day6

独立写了自己第一个Android app -----------a+b！！！！！

自己手机Android版本4.2太低，安装时会出现解析失败，装到室友手机上就好了~~

happy~~

 package com.example.tt1;

 import android.app.Activity;
 import android.os.Bundle;
 import android.view.*;
 import android.widget.Button;
 import android.widget.*;

 public class MainActivity extends Activity {

     ;
     private EditText add1;
     private EditText add2;

     private TextView textsum;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

         Button button=(Button)this.findViewById(R.id.button1);

         textsum=(TextView)findViewById(R.id.sum);

         button.setOnClickListener(new ButtonClickListener());

     }

     private class ButtonClickListener implements View.OnClickListener{
         @Override
         public void onClick(View v) {
             // TODO Auto-generated method stub

             add1=(EditText)findViewById(R.id.add1);
             add2=(EditText)findViewById(R.id.add2);
             int a1=Integer.parseInt( add1.getText().toString());
             int a2=Integer.parseInt( add2.getText().toString());
             sum=a1+a2;
             textsum.setText(String.valueOf(sum) );

              Toast.makeText(getApplicationContext(), ).show();
             }

         }

     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         // Inflate the menu; this adds items to the action bar if it is present.
         getMenuInflater().inflate(R.menu.main, menu);
         return true;
     }

     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         // Handle action bar item clicks here. The action bar will
         // automatically handle clicks on the Home/Up button, so long
         // as you specify a parent activity in AndroidManifest.xml.
         int id = item.getItemId();
         if (id == R.id.action_settings) {
             return true;
         }
         return super.onOptionsItemSelected(item);
     }
 }