Android Intent传值且实现窗体跳转

main.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="fill_parent"
 4     android:layout_height="fill_parent"
 5     android:orientation="vertical" >
 6 
 7     <EditText 
 8         android:id="@+id/one"
 9         android:layout_width="fill_parent"
10            android:layout_height="wrap_content"
11         />
12     <EditText 
13         android:id="@+id/two"
14         android:layout_width="fill_parent"
15            android:layout_height="wrap_content"
16         />
17     <Button 
18         android:id="@+id/btn"
19         android:layout_width="fill_parent"
20            android:layout_height="wrap_content"
21            android:text="计算"
22         />
23 </LinearLayout>

result.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="fill_parent"
 4     android:layout_height="fill_parent"
 5     android:orientation="vertical" >
 6 
 7 <TextView 
 8     android:id="@+id/result"
 9     android:layout_width="fill_parent"
10     android:layout_height="fill_parent"
11 />    
12 </LinearLayout>

AndroidManifest.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3     package="mars.activity"
 4     android:versionCode="1"
 5     android:versionName="1.0" >
 6 
 7     <uses-sdk android:minSdkVersion="10" />
 8 
 9     <application
10         android:icon="@drawable/ic_launcher"
11         android:label="@string/app_name" >
12         <activity
13             android:name=".CalcActivity"
14             android:label="@string/app_name" >
15             <intent-filter>
16                 <action android:name="android.intent.action.MAIN" />
17 
18                 <category android:name="android.intent.category.LAUNCHER" />
19             </intent-filter>
20         </activity>
21                 <activity
22             android:name=".ResultActivity"
23             android:label="@string/app_name" >
24         </activity>
25     </application>
26 
27 </manifest>

CalcActivity.java

 1 package mars.activity;
 2 
 3 import android.app.Activity;
 4 import android.content.Intent;
 5 import android.os.Bundle;
 6 import android.view.View;
 7 import android.view.View.OnClickListener;
 8 import android.widget.Button;
 9 import android.widget.EditText;
10 
11 public class CalcActivity extends Activity {
12     /** Called when the activity is first created. */
13     private Button btn=null;
14     private EditText one=null;
15     private EditText two=null;
16     @Override
17     public void onCreate(Bundle savedInstanceState) {
18         super.onCreate(savedInstanceState);
19         setContentView(R.layout.main);
20         btn=(Button) this.findViewById(R.id.btn);
21         one=(EditText) this.findViewById(R.id.one);
22         two=(EditText) this.findViewById(R.id.two);
23         btn.setOnClickListener(new btnOnClickListener());
24     }
25     
26     class btnOnClickListener implements OnClickListener{
27 
28         @Override
29         public void onClick(View v) {
30             Intent i=new Intent();
31             String onestr=one.getText().toString();
32             i.putExtra("one", onestr);
33             String twostr=two.getText().toString();
34             i.putExtra("two", twostr);
35             int one=Integer.parseInt(onestr);
36             int two=Integer.parseInt(twostr);
37             int res=one+two;
38             i.putExtra("res", res);
39             i.setClass(CalcActivity.this, ResultActivity.class);
40             startActivity(i);
41         }
42         
43     }
44 }

ResultActivity.java

 1 package mars.activity;
 2 
 3 import android.app.Activity;
 4 import android.content.Intent;
 5 import android.os.Bundle;
 6 import android.widget.TextView;
 7 
 8 public class ResultActivity extends Activity {
 9 
10     @Override
11     protected void onCreate(Bundle savedInstanceState) {
12         super.onCreate(savedInstanceState);
13         setContentView(R.layout.result);
14         TextView result=(TextView) this.findViewById(R.id.result);
15         Intent intent=getIntent();
16         String value1=intent.getStringExtra("one");
17         String value2=intent.getStringExtra("two");
18         int res=intent.getIntExtra("res", 0);
19         result.setText(value1+"+"+value2+"="+res);
20     }
21 
22 }