[Android智慧型手機設計_傳遞資料給其他活動以Intent6_2為例]

woff

完成圖

1.來源_First.java

/*

//1.建立Intent物件

Intent myIntent = new Intent();

//2.藉由setClass()方法設定來源與目的地類別
myIntent.setClass(First.this, Second.class);
//3.建立Bundle物件，利用putString(鍵值,資料)方法新增字串資料
Bundle bundle = new Bundle();
bundle.putString("HEIGHT", height.getText().toString());
bundle.putString("WEIGHT“, weight.getText().toString());
//4.使用Intenet物件的puExtras()方法，附加Bundle物件
myIntent.putExtras(bundle);
//6.啟動活動
startActivity(myIntent);
*/

1. package com.example.intent6_2;
   
2. 
   
3. import android.os.Bundle;
   
4. import android.app.Activity;
   
5. import android.content.Intent;
   
6. import android.view.Menu;
   
7. import android.view.View;
   
8. import android.view.View.OnClickListener;
   
9. import android.widget.Button;
   
10. import android.widget.EditText;
    
11. 
    
12. public class First extends Activity {
    
13. EditText et1,et2,et3;
    
14. Button btn1;
    
15. @Override
    
16. protected void onCreate(Bundle savedInstanceState) {
    
17. super.onCreate(savedInstanceState);
    
18. setContentView(R.layout.first);
    
19. et1=(EditText)findViewById(R.id.editText1);
    
20. et2=(EditText)findViewById(R.id.editText2);
    
21. et3=(EditText)findViewById(R.id.editText3);
    
22. btn1=(Button)findViewById(R.id.button1);
    
23. btn1.setOnClickListener(new OnClickListener(){
    
24. @Override
    
25. public void onClick(View v) {
    
26. Intent i=new Intent();
    
27. i.setClass(First.this, Second.class);
    
28. Bundle b1=new Bundle();
    
29. b1.putString("1", et1.getText().toString());
    
30. b1.putString("2", et2.getText().toString());
    
31. b1.putString("3", et3.getText().toString());
    
32. i.putExtras(b1);
    
33. startActivity(i);
    
34. }});
    
35. }
    
36. }

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2.目的地_Second.java
/*在目標活動可以呼叫Activity物件的getIntent()方法取得Intent物件，
然後呼叫Intent物件的getExtras()方法取得攜帶的Bundle物件*/

1. package com.example.intent6_2;
   
2. 
   
3. import android.app.Activity;
   
4. import android.os.Bundle;
   
5. import android.widget.TextView;
   
6. 
   
7. public class Second extends Activity {
   
8. 
   
9. protected void onCreate(Bundle savedInstanceState) {
   
10. super.onCreate(savedInstanceState);
    
11. setContentView(R.layout.second);
    
12. double n1,n2,n3,sum,avg;
    
13. Bundle b2=this.getIntent().getExtras();
    
14. if(b2!=null){
    
15. n1=Double.parseDouble(b2.getString("1"));
    
16. n2=Double.parseDouble(b2.getString("2"));
    
17. n3=Double.parseDouble(b2.getString("3"));
    
18. sum=n1+n2+n3;
    
19. avg=sum/3;
    
20. TextView output=(TextView)findViewById(R.id.output);
    
21. output.setText(getString(R.string.s1)+n1+getString(R.string.s2)+n2+getString(R.string.s3)+n3
    
22. +"\n"+getString(R.string.s4)+sum+getString(R.string.s5)+avg);
    
23. }
    
24. }
    
25. }

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