Android 数据传递Bundle

Android 数据传递Bundle

是以一个计算器的形式实现的

TranslateDateActivity.java

1. package rw.data;  
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.ArrayAdapter;  
9. import android.widget.Button;  
10. import android.widget.EditText;  
11. import android.widget.Spinner;  
12.   
13.   
14. public class TranslateDateActivity extends Activity {  
15.     /** Called when the activity is first created. */  
16.      
17.     private EditText oneEditText,twoEditText;  
18.     private Spinner spinner;  
19.     private Button button;  
20.     public void onCreate(Bundle savedInstanceState) {  
21.         super.onCreate(savedInstanceState);  
22.         setContentView(R.layout.main);  
23.         oneEditText=(EditText)findViewById(R.id.editText1);  
24.         twoEditText=(EditText)findViewById(R.id.editText2);  
25.         spinner=(Spinner)findViewById(R.id.spinner1);  
26.         ArrayAdapter<String> adapter=new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_spinner_dropdown_item);  
27.         adapter.add("+");  
28.         adapter.add("-");  
29.         adapter.add("*");  
30.         adapter.add("/");  
31.         spinner.setAdapter(adapter);  
32.         button=(Button)findViewById(R.id.button1);  
33.         button.setOnClickListener(new ButtonListener());  
34.     }  
35.     class ButtonListener implements OnClickListener{  
36.   
37.         @Override  
38.         public void onClick(View v) {  
39.             // TODO Auto-generated method stub   
40.             Intent intent=new Intent();  
41.             Bundle bundle=new Bundle();  
42.             bundle.putString("onetext", oneEditText.getText().toString());  
43.             bundle.putString("spinner", spinner.getSelectedItem().toString());  
44.             bundle.putString("twotext", twoEditText.getText().toString());  
45.             intent.putExtras(bundle);  
46.             intent.setClass(getApplicationContext(), result.class);  
47.               
48.             TranslateDateActivity.this.startActivity(intent);  
49.         }  
50.           
51.     }  
52. }  

result.java

1. package rw.data;  
2.   
3.   
4. import android.app.Activity;  
5. import android.os.Bundle;  
6. import android.widget.TextView;  
7.   
8. public class result extends Activity {  
9.     /** Called when the activity is first created. */  
10.   
11.     private TextView textView,textView2,textView3,textView4,textView5;  
12.     public void onCreate(Bundle savedInstanceState) {  
13.         super.onCreate(savedInstanceState);  
14.         setContentView(R.layout.calculateresult);  
15.         textView=(TextView)findViewById(R.id.textView1);  
16.         textView2=(TextView)findViewById(R.id.textView2);  
17.         textView3=(TextView)findViewById(R.id.textView3);  
18.         textView4=(TextView)findViewById(R.id.textView4);  
19.         textView5=(TextView)findViewById(R.id.textView5);  
20.          Bundle bundle=getIntent().getExtras();  
21.         textView.setText(bundle.getString("onetext"));  
22.         textView2.setText(bundle.getString("spinner"));  
23.         textView3.setText(bundle.getString("twotext"));  
24.        if (bundle.getString("spinner").endsWith("+")) {  
25.         textView5.setText(String.valueOf(Integer.parseInt(textView.getText().toString())+Integer.parseInt(textView3.getText().toString())));  
26.         }else if(bundle.getString("spinner").endsWith("-")){  
27.             textView5.setText(String.valueOf(Integer.parseInt(textView.getText().toString())-Integer.parseInt(textView3.getText().toString())));  
28.   
29.         }else if (bundle.getString("spinner").endsWith("*")) {  
30.             textView5.setText(String.valueOf(Integer.parseInt(textView.getText().toString())*Integer.parseInt(textView3.getText().toString())));  
31.   
32.         }else  {  
33.             textView5.setText(String.valueOf(Integer.parseInt(textView.getText().toString())/Integer.parseInt(textView3.getText().toString())));  
34. //由于设置的是整形，所以除法有误差   
35.         }  
36.     }  
37. }  

main.xml

1. <?xml version="1.0" encoding="utf-8"?>  
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
3.     android:orientation="vertical"  
4.     android:layout_width="fill_parent"  
5.     android:layout_height="fill_parent"  
6.     >  
7. <TextView    
8.     android:layout_width="fill_parent"   
9.     android:layout_height="wrap_content"   
10.     android:text="@string/hello"  
11.     />  
12. <EditText android:layout_height="wrap_content" android:layout_width="match_parent" android:id="@+id/editText1">  
13.     <requestFocus></requestFocus>  
14.     </EditText>  
15. <Spinner android:layout_width="match_parent" android:id="@+id/spinner1" android:layout_height="wrap_content"></Spinner>  
16. <EditText android:layout_height="wrap_content" android:layout_width="match_parent" android:id="@+id/editText2">  
17.     <requestFocus></requestFocus>  
18. </EditText>  
19. <Button android:id="@+id/button1" android:layout_height="wrap_content" android:text="计算" android:layout_width="match_parent"></Button>  
20.   
21. </LinearLayout>  

calculateresult.xml

1. <?xml version="1.0" encoding="utf-8"?>  
2. <LinearLayout  
3.   xmlns:android="http://schemas.android.com/apk/res/android"  
4.   android:orientation="horizontal"  
5.   android:layout_width="match_parent"  
6.   android:layout_height="match_parent">  
7.     <TextView android:text="TextView" android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content"></TextView>  
8.     <TextView android:text="TextView" android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content"></TextView>  
9.     <TextView android:text="TextView" android:id="@+id/textView3" android:layout_width="wrap_content" android:layout_height="wrap_content"></TextView>  
10.     <TextView android:text="=" android:id="@+id/textView4" android:layout_width="wrap_content" android:layout_height="wrap_content"></TextView>  
11.     <TextView android:text="TextView" android:id="@+id/textView5" android:layout_width="wrap_content" android:layout_height="wrap_content"></TextView>  
12.     
13. </LinearLayout>