標籤:layout new inflate 詳解 set 指定 ext4 tis protect
今天主要是實現按照指定的題目出題數目出題。在昨天設定頁面的基礎上,今天首先要學習的是接收不同頁面間的參數問題。詳解如下:
然後就開始我的傳參和接收參數的問題!
在當前的Activity上進行跳轉,
代碼如下:
package com.example.mmmjh.calculator;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.app.AlertDialog;
import android.content.Intent;
import android.widget.TextView;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.content.DialogInterface;
import android.widget.Toast;
public class activity_calculators extends AppCompatActivity {
private Button begin;
EditText b,min,sec;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_calculators);
begin=(Button)findViewById(R.id.button1);
b=(EditText)findViewById(R.id.editText2);
min=(EditText)findViewById(R.id.editText3);
sec=(EditText)findViewById(R.id.editText4);
begin.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent=new Intent();
String tishu=b.getText().toString();//擷取輸入的數值
Bundle bundle = new Bundle();
bundle.putString("tishu", tishu);
intent.putExtras(bundle);//將題目數量傳入下一個頁面 這是一個方法
intent.setClass(activity_calculators.this, CalculatorActivity.class);//跳轉
startActivity(intent);
activity_calculators.this.finish();
}
}
跳轉的目標頁面的java代碼:
CalculatorActivity.class:
package com.example.mmmjh.calculator;
import java.util.Random;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import android.content.Intent;
public class CalculatorActivity extends Activity {
private Random num1=new Random();//隨機數產生
private Random num2=new Random();//隨機數產生
private Random r = new Random();
private char[] ch = {‘+‘,‘-‘,‘ב,‘÷‘}; //字元數組
private int index = r.nextInt(ch.length); //隨機數,小於數組的長度數, 0~3
private char a=ch[index];//擷取運算子號
private TextView text1,text2,text3;
private EditText answer;
private Button surebutton;//確定按鈕
private int i1,i2,i3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_calculator);
Intent intent = getIntent();
Bundle bundle = intent.getExtras();
String tishu = bundle.getString("tishu");//接收傳過來的題目的數量
int i=0;
try {
i = Integer.parseInt(tishu);//i在這裡是題目數量的整形值
} catch (NumberFormatException e) {
e.printStackTrace();
}
text1=(TextView)findViewById(R.id.textView1);//隨機數字
text2=(TextView)findViewById(R.id.textView2);//運算子號
text3=(TextView)findViewById(R.id.textView3);//隨機數字
answer=(EditText)findViewById(R.id.editText1);//運算結果
String c=String.valueOf(num1.nextInt(100));
i2=Integer.valueOf(c);//將產生的數值轉換成整形
String d=String.valueOf(a);//運算子
String e=String.valueOf(num2.nextInt(100));
i3=Integer.valueOf(e);//將產生的數值轉換成整形
while((d.equals("÷")&&i2%i3!=0)||(d.equals("-")&&i2<i3)||(d.equals("×")&&(i2*i3)>100)||(d.equals("+")&&(i2+i3)>100))
{
text1=(TextView)findViewById(R.id.textView1);//隨機數字
text3=(TextView)findViewById(R.id.textView3);//隨機數字
c=String.valueOf(num1.nextInt(100));
i2=Integer.valueOf(c);//將產生的數值轉換成整形
e=String.valueOf(num2.nextInt(100));
i3=Integer.valueOf(e);//將產生的數值轉換成整形
}
text1.setText(c);//隨機數1-100 為他們賦值
text2.setText(d);//隨機運算子+,-,*,/
text3.setText(e);//隨機數1-100 賦值 在手機上顯示出來
surebutton=(Button)findViewById(R.id.surebutton);//確定按鈕
surebutton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
final String b=answer.getText().toString();//擷取輸入的數值
i1=Integer.valueOf(b);//將擷取的值轉換成整形
switch(index){//index是上面判斷是數組中哪個運算子的
case 0:
{
if(i1==(i2+i3))
Toast.makeText(CalculatorActivity.this, "正確,答案為"+b, Toast.LENGTH_SHORT).show();
else
Toast.makeText(CalculatorActivity.this, "錯誤,正確答案為"+(i3+i2), Toast.LENGTH_SHORT).show();
break;
}
case 1:
{
if(i1==(i2-i3))
Toast.makeText(CalculatorActivity.this, "正確,答案為"+b, Toast.LENGTH_SHORT).show();
else
Toast.makeText(CalculatorActivity.this, "錯誤,正確答案為"+(i2-i3), Toast.LENGTH_SHORT).show();
break;
}
case 2:{
if(i1==(i2*i3))
Toast.makeText(CalculatorActivity.this, "正確,答案為"+b, Toast.LENGTH_SHORT).show();
else
Toast.makeText(CalculatorActivity.this, "錯誤,正確答案為"+(i2*i3), Toast.LENGTH_SHORT).show();
break;
}
case 3:
{
if(i3!=0){
if(i1==((double)i2/(double)i3))
Toast.makeText(CalculatorActivity.this, "正確,答案為"+b, Toast.LENGTH_SHORT).show();
else
Toast.makeText(CalculatorActivity.this, "錯誤,正確答案為"+((double)i2/(double)i3), Toast.LENGTH_SHORT).show();
}
break;
}
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.calculator, menu);
return true;
}
}
目前只能做到這個效果,還要把橫線改位置!
小學四則運算口算練習app---No.3