四则运算，安卓版
题目：四则运算安卓版
设计思想：安卓版四则运算相对来说思路较为简单，分为三部分：简单，一般，复杂。简单里面主要是加减法，一般里面是乘除法，复杂里面是涉及四则运算的，有加减乘除。分为四个界面（1）首页，（2）简单页面，（3）一般难度页面，（4）复杂页面。在首页可以选择自己相应的难度，从而调用事件跳转到对应的界面，自动出题，填出结果，然后提交判断是否正确。如果想继续做，可以点击下一题。
实验代码：
package com.jingpan.calculating; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; public class MainActivity extends Activity { private Button b1; private Button b2; private Button b3; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); b1=(Button)findViewById(R.id.button1); b2=(Button)findViewById(R.id.button2); b3=(Button)findViewById(R.id.button3); b1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Intent intent=new Intent(MainActivity.this,SimpleActivity.class); startActivity(intent); finish(); } }); b2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Intent intent=new Intent(MainActivity.this,CommonActivity.class); startActivity(intent); finish(); } }); b3.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Intent intent=new Intent(MainActivity.this,ComplexActivity.class); startActivity(intent); finish(); } }); } @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); // } }
package com.jingpan.calculating; import java.util.Random; import android.app.Activity; import android.content.Intent; import android.graphics.Interpolator; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; public class SimpleActivity extends Activity { private TextView t; private EditText e; private Button bn; private EditText et; private int r; private Button bnext; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.simplemain); t=(TextView)findViewById(R.id.textView2); e=(EditText)findViewById(R.id.editText1); bn=(Button)findViewById(R.id.button1); et=(EditText)findViewById(R.id.editText2); bnext=(Button)findViewById(R.id.button2); int a,b; /*int n; n=Integer.valueOf(e.getText().toString());*/ a=(int) (1+Math.random()*10); b=(int) (1+Math.random()*10); int c; char ch; c=(int)(1+Math.random()*10); if(c/2==0) { ch='+'; r=a+b; } else{ ch='-'; r=a-b; } t.setText(""+a+" "+ch+" "+b+" "+"="); bn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub int result; result=Integer.parseInt(et.getText().toString()); String t=""; if(result==r) { t="答对了！！！"; } else { t="答错了!!!正确答案是"+r; } Toast.makeText(SimpleActivity.this, t, Toast.LENGTH_LONG).show(); } }); bnext.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Intent intent=new Intent(SimpleActivity.this,SimpleActivity.class); startActivity(intent); finish(); } }); } @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); } }
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.jingpan.calculating.MainActivity" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginLeft="95dp" android:layout_marginTop="22dp" android:text="简单" /> <TextView android:id="@+id/textView4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView3" android:layout_below="@+id/editText1" android:layout_marginTop="41dp" android:text="计算式：" /> <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textView4" android:layout_alignBottom="@+id/textView4" android:layout_alignLeft="@+id/textView1" android:text="TextView" /> <TextView android:id="@+id/textView5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView4" android:layout_below="@+id/textView4" android:layout_marginTop="38dp" android:text="结果：" /> <EditText android:id="@+id/editText2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textView5" android:layout_alignBottom="@+id/textView5" android:layout_toRightOf="@+id/textView5" android:ems="10" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/editText2" android:layout_below="@+id/editText2" android:layout_marginTop="51dp" android:text="确认" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/button1" android:layout_alignBottom="@+id/button1" android:layout_marginLeft="19dp" android:layout_toRightOf="@+id/textView2" android:text="下一题" /> </RelativeLayout>
package com.jingpan.calculating; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; public class CommonActivity extends Activity { private TextView t; private EditText e; private Button bn; private EditText et; private double r; private Button bnext; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.commonmain); t=(TextView)findViewById(R.id.textView2); e=(EditText)findViewById(R.id.editText1); bn=(Button)findViewById(R.id.button1); et=(EditText)findViewById(R.id.editText2); bnext=(Button)findViewById(R.id.button2); float a,b; /*int n; n=Integer.valueOf(e.getText().toString());*/ a=(int) (1+Math.random()*10); b=(int) (1+Math.random()*10); int c; char ch; c=(int)(1+Math.random()*10); if(c/2==0) { ch='*'; r=(float)(a*b); } else{ ch='/'; r=(float)(a/b); } t.setText(""+a+" "+ch+" "+b+" "+"="); bn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub float result; result=Float.parseFloat(et.getText().toString()); String t=""; if(result==r) { t="答对了！！！"; } else { t="答错了!!!正确答案是"+r; } Toast.makeText(CommonActivity.this, t, Toast.LENGTH_LONG).show(); } }); bnext.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Intent intent=new Intent(CommonActivity.this,CommonActivity.class); startActivity(intent); finish(); } }); } @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); } }
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.jingpan.calculating.MainActivity" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginLeft="95dp" android:layout_marginTop="22dp" android:text="一般" /> <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textView3" android:layout_alignBottom="@+id/textView3" android:layout_toRightOf="@+id/textView3" android:ems="10" > <requestFocus /> </EditText> <TextView android:id="@+id/textView4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView3" android:layout_below="@+id/editText1" android:layout_marginTop="41dp" android:text="计算式：" /> <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textView4" android:layout_alignBottom="@+id/textView4" android:layout_alignLeft="@+id/textView1" android:text="TextView" /> <TextView android:id="@+id/textView5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView4" android:layout_below="@+id/textView4" android:layout_marginTop="38dp" android:text="结果：" /> <EditText android:id="@+id/editText2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textView5" android:layout_alignBottom="@+id/textView5" android:layout_toRightOf="@+id/textView5" android:ems="10" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/editText2" android:layout_below="@+id/editText2" android:layout_marginTop="51dp" android:text="确认" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/button1" android:layout_alignBottom="@+id/button1" android:layout_marginLeft="19dp" android:layout_toRightOf="@+id/textView2" android:text="下一题" /> </RelativeLayout>
package com.jingpan.calculating; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; public class ComplexActivity extends Activity{ private TextView t; private EditText e; private Button bn; private EditText et; private double r; private Button bnext; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.complexmain); t=(TextView)findViewById(R.id.textView2); e=(EditText)findViewById(R.id.editText1); bn=(Button)findViewById(R.id.button1); et=(EditText)findViewById(R.id.editText2); bnext=(Button)findViewById(R.id.button2); float a,b,d,e; /*int n; n=Integer.valueOf(e.getText().toString());*/ a=(int) (1+Math.random()*10); b=(int) (1+Math.random()*10); d=(int) (1+Math.random()*10); int c; char ch = 0; char ch1 = 0; c=(int)(1+Math.random()*10); e=(int)(1+Math.random()*10); if(c/4==0) { ch='+'; if(e/4==0) { ch1='+'; r=(float)(a+b+d); } else if(e/4==1) { ch1='-'; r=(float)(a-b-d); } else if(e/4==2) { ch1='*'; r=(float)(a*b*d); } else if(e/4==3) { ch1='*'; r=(float)(a*b*d); } t.setText(""+a+" "+ch+" "+b+" "+ch1+" "+d+" "+"="); } if(c/4==1) { ch='-'; if(e/4==0) { ch1='+'; r=(float)(a-b+d); } else if(e/4==1) { ch1='-'; r=(float)(a-b-d); } else if(e/4==2) { ch1='*'; r=(float)(a-b*d); } else if(e/4==3) { ch1='/'; r=(float)(a-b/d); } t.setText(""+a+" "+ch+" "+b+" "+ch1+" "+d+" "+"="); } if(c/4==2) { ch='*'; if(e/4==0) { ch1='+'; r=(float)(a*b+d); } else if(e/4==1) { ch1='-'; r=(float)(a*b-d); } else if(e/4==2) { ch1='*'; r=(float)(a*b*d); } else if(e/4==3) { ch1='/'; r=(float)(a*b/d); } t.setText(""+a+" "+ch+" "+b+" "+ch1+" "+d+" "+"="); } bn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub float result; result=Float.parseFloat(et.getText().toString()); String t=""; if(result==r) { t="答对了！！！"; } else { t="答错了!!!正确答案是"+r; } Toast.makeText(ComplexActivity.this, t, Toast.LENGTH_LONG).show(); } }); bnext.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Intent intent=new Intent(ComplexActivity.this,ComplexActivity.class); startActivity(intent); finish(); } }); } }
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.jingpan.calculating.MainActivity" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginLeft="95dp" android:layout_marginTop="22dp" android:text="复杂" /> <TextView android:id="@+id/textView4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView3" android:layout_below="@+id/editText1" android:layout_marginTop="41dp" android:text="计算式：" /> <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textView4" android:layout_alignBottom="@+id/textView4" android:layout_alignLeft="@+id/textView1" android:text="TextView" /> <TextView android:id="@+id/textView5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView4" android:layout_below="@+id/textView4" android:layout_marginTop="38dp" android:text="结果：" /> <EditText android:id="@+id/editText2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textView5" android:layout_alignBottom="@+id/textView5" android:layout_toRightOf="@+id/textView5" android:ems="10" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/editText2" android:layout_below="@+id/editText2" android:layout_marginTop="51dp" android:text="确认" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/button1" android:layout_alignBottom="@+id/button1" android:layout_marginLeft="19dp" android:layout_toRightOf="@+id/textView2" android:text="下一题" /> </RelativeLayout>
试验截图：
缺陷日志：本次试验虽然实现了主要功能但是还是存在很大的缺陷，因为在运算除法的时候小数点的位数无法控制。界面也不是很友好，存在很大的问题，还需要改进。
实验总结：
