效果
来设置第一个Activity
main.xml
<?xml version="1.0" encoding="utf-8"?><AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><EditTextandroid:id="@+id/heigths"android:layout_width="129px"android:layout_height="wrap_content"android:textSize="18sp"android:layout_x="122px"android:layout_y="141px"></EditText><RadioGroup android:id="@+id/sexs" android:layout_width="wrap_content" android:layout_x="122px" android:orientation="horizontal" android:layout_y="87px" android:layout_height="wrap_content"><RadioButtonandroid:id="@+id/boy"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="男"></RadioButton><RadioButtonandroid:id="@+id/gril"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="女"></RadioButton></RadioGroup><TextViewandroid:id="@+id/sexText"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="性别:"android:layout_x="51px"android:layout_y="102px"></TextView><TextViewandroid:id="@+id/heigth"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="身高:"android:layout_x="51px"android:layout_y="152px"></TextView><Buttonandroid:id="@+id/count"android:layout_width="74px"android:layout_height="wrap_content"android:text="计算"android:layout_x="140px"android:layout_y="203px"></Button></AbsoluteLayout>
设置第二个Activity新建一个layout2.xml文件
<?xml version="1.0" encoding="utf-8"?><AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><TextViewandroid:id="@+id/text"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="性别:"android:layout_x="74px"android:layout_y="106px"></TextView></AbsoluteLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="transfer.data" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".TransferData" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".TransferData2"></activity> </application></manifest>
在来看看R.java
/* AUTO-GENERATED FILE. DO NOT MODIFY. * * This class was automatically generated by the * aapt tool from the resource data it found. It * should not be modified by hand. */package transfer.data;public final class R { public static final class attr { } public static final class drawable { public static final int icon=0x7f020000; } public static final class id { public static final int boy=0x7f050003; public static final int count=0x7f050007; public static final int gril=0x7f050004; public static final int heigth=0x7f050006; public static final int heigths=0x7f050001; public static final int sexText=0x7f050005; public static final int sexs=0x7f050002; public static final int text=0x7f050000; } public static final class layout { public static final int layout2=0x7f030000; public static final int main=0x7f030001; } public static final class string { public static final int app_name=0x7f040001; public static final int hello=0x7f040000; }}好了配置完了接下来开始写代码了
package transfer.data;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.RadioButton;public class TransferData extends Activity { /** Called when the activity is first created. */ private Button bt; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); /**载入main.xml*/ setContentView(R.layout.main); /**找到计算按钮*/ bt=(Button)findViewById(R.id.count); /**设置按钮的监听事件*/ bt.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v){ /**找到文本框*/ EditText et=(EditText)findViewById(R.id.heigths); /**将文本框的值转换为 double类型的*/ double height=Double.parseDouble(et.getText().toString()); String sex=""; /**找到单选按钮*/ RadioButton rb1=(RadioButton)findViewById(R.id.boy); /**判断是否被选中*/ if(rb1.isChecked()){ sex="男"; }else{ sex="女"; } /**实例化Intent对像,并指定传递的class*/ Intent intent=new Intent(); intent.setClass(TransferData.this, TransferData2.class); /**实例化Bundle对像,把将要传递的数据以键值对的形式添加进去*/ Bundle bundle=new Bundle(); /**添加的是Double类型的数值*/ bundle.putDouble("height", height); /**添加的是String类型的数值*/ bundle.putString("sex", sex); /**将设置好值的Bundle对象添加进Intent*/ intent.putExtras(bundle); /**调用TransferData2 传递开始*/ startActivity(intent); } }); }}package transfer.data;import java.text.DecimalFormat;import java.text.NumberFormat;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;public class TransferData2 extends Activity { public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); /**载入layout*/ setContentView(R.layout.layout2); /**获取 Bundle对象*/ Bundle bundle=this.getIntent().getExtras(); /**获取 传递过来的值也就是性别*/ String sex=bundle.getString("sex"); /**获取 传递过来的值身高*/ double height=bundle.getDouble("height"); /**通过id找到TextView组件对象*/ TextView text=(TextView)findViewById(R.id.text); /**设置TextView的文本值*/ text.setText("性别:"+sex+"\n身高:"+height+"\n标准体重:"+getWeight(sex, height)); } public String format(double num){ NumberFormat formatter=new DecimalFormat("0.00"); String count=formatter.format(num); return count; } /**计算男女标准体重*/ public String getWeight(String sex,double height){ String weight=""; weight=format((height-80)*0.7); if(sex.equals("男")){ weight=format((height-70)*0.7); } return weight; }}