android简单计算器代码.doc

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1、packagehua.xing.demo;importandroid.app.Activity;importandroid.os.Bundle;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.widget.Button;importandroid.widget.EditText;publicclassCalculatordemoActivityextendsActivityimplementsOnClickListener{/**

2、Calledwhentheactivityisfirstcreated.*/privateButtonbut0=null;privateButtonbut1=null;privateButtonbut2=null;privateButtonbut3=null;privateButtonbut4=null;privateButtonbut5=null;privateButtonbut6=null;privateButtonbut7=null;privateButtonbut8=null;privateButtonbut9=null;pri

3、vateButtondim=null;privateButtonadd=null;privateButtonsub=null;privateButtonmult=null;privateButtondiv=null;privateButtonequ=null;privateEditTextetext=null;privatedoublevalue=0;privateStringstr1=null;privateStringtem="";privateStringsign="a";@OverridepublicvoidonCreate(B

4、undlesavedInstanceState){super.onCreate(savedInstanceState);super.setContentView(R.layout.main);add=(Button)findViewById(R.id.add);sub=(Button)findViewById(R.id.sub);mult=(Button)findViewById(R.id.mult);div=(Button)findViewById(R.id.divid);equ=(Button)findViewById(R.id.c

5、aculate);but1=(Button)findViewById(R.id.but1);but3=(Button)findViewById(R.id.but3);but2=(Button)findViewById(R.id.but2);but4=(Button)findViewById(R.id.but4);but5=(Button)findViewById(R.id.but5);but6=(Button)findViewById(R.id.but6);but7=(Button)findViewById(R.id.but7);but

6、8=(Button)findViewById(R.id.but8);but9=(Button)findViewById(R.id.but9);but0=(Button)findViewById(R.id.but0);dim=(Button)findViewById(R.id.dim);etext=(EditText)findViewById(R.id.etext);add.setOnClickListener(newAListener());sub.setOnClickListener(newAListener());mult.setO

7、nClickListener(newAListener());div.setOnClickListener(newAListener());equ.setOnClickListener(newListener());but1.setOnClickListener(this);but3.setOnClickListener(this);but2.setOnClickListener(this);but4.setOnClickListener(this);but5.setOnClickListener(this);but6.setOnCli

8、ckListener(this);but7.setOnClickListener(this);but8.setOnClickListener(this);but9.setOnClickListener(th