開啟新的activity擷取它的傳回值，activity擷取傳回值

開啟新的activity擷取它的傳回值，activity擷取傳回值

1、開始介面

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context=".MainActivity" >    <LinearLayout         android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:orientation="horizontal"        >        <EditText            android:id="@+id/et_number"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:hint="請輸入連絡人" />        <Button             android:onClick="click"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="連絡人"            />    </LinearLayout>     <LinearLayout         android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:orientation="horizontal"        >        <EditText            android:id="@+id/et_number2"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:hint="請輸入連絡人" />        <Button             android:onClick="click2"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="連絡人2"            />    </LinearLayout></LinearLayout>

2、開啟新的activity代碼

 1 package com.example.smssender; 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.widget.EditText; 9 10 public class MainActivity extends Activity {11 12     private EditText et_number;13     private EditText et_number2;14     @Override15     protected void onCreate(Bundle savedInstanceState) {16         super.onCreate(savedInstanceState);17         setContentView(R.layout.activity_main);18         et_number = (EditText) findViewById(R.id.et_number);19         et_number2 = (EditText) findViewById(R.id.et_number2);20     }21 22     public void click(View view){23         Intent intent = new Intent(this, ContactActivity.class);24         //startActivity(intent);25         //請求碼的作用是區別是誰發起的請求26         startActivityForResult(intent, 1);27     }28     29     public void click2(View view){30         Intent intent = new Intent(this, ContactActivity.class);31         //startActivity(intent);32         //請求碼的作用是區別是誰發起的請求33         startActivityForResult(intent, 2);34     }35     36     37     @Override38     protected void onActivityResult(int requestCode, int resultCode, Intent data) {39         // TODO Auto-generated method stub40         super.onActivityResult(requestCode, resultCode, data);41         if(data != null){42             String number = data.getStringExtra("number");43             if(requestCode == 1){44                 et_number.setText(number);45             }else{46                 et_number2.setText(number);47             }48         }49     }50 51 }

3、擷取連絡人

      1)資訊清單檔

　　<uses-permission android:name="android.permission.READ_CONTACTS"/>//許可權

      2)通過內容提供者擷取連絡人

       

 1 package com.example.smssender; 2  3 import java.util.ArrayList; 4 import java.util.List; 5  6 import android.content.ContentResolver; 7 import android.content.Context; 8 import android.database.Cursor; 9 import android.net.Uri;10 11 public class ContactService {12     public static List<contactInfo> getContactAll(Context context){13         List<contactInfo> infos = new ArrayList<contactInfo>();14         //通過內容提供者擷取連絡人15         ContentResolver resolver = context.getContentResolver();16         Uri uri = Uri.parse("content://com.android.contacts/raw_contacts");17         Uri dataUri = Uri.parse("content://com.android.contacts/data");18         Cursor cursor = resolver.query(uri, null, null, null, null);19         while(cursor.moveToNext()){20             String id = cursor.getString(cursor.getColumnIndex("contact_id"));21             Cursor datacursor = resolver.query(dataUri, null, "raw_contact_id=?", new String[]{id}, null);22             contactInfo info = new contactInfo();23             while(datacursor.moveToNext()){24                 String data1 = datacursor.getString(datacursor.getColumnIndex("data1"));25                 String mimetype = datacursor.getString(datacursor.getColumnIndex("mimetype"));26                 if("vnd.android.cursor.item/name".equals(mimetype)){27                     info.setUsername(data1);28                 }else if("vnd.android.cursor.item/phone_v2".equals(mimetype)){29                     info.setNumber(data1);30                 }31             }32             33             infos.add(info);34             35         }36         return infos;37     }38 }

4、設定連絡人進Listview

 1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3     android:layout_width="match_parent" 4     android:layout_height="match_parent" 5     android:orientation="vertical" > 6      7     <ListView 8         android:layout_width="match_parent" 9         android:layout_height="match_parent" 10         android:id="@+id/lv_contact"11         ></ListView>12 13 </LinearLayout>

 1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3     android:layout_width="match_parent" 4     android:layout_height="match_parent" 5     android:orientation="vertical" > 6      7     <TextView  8         android:id="@+id/et_username" 9         android:layout_width="match_parent"10         android:layout_height="wrap_content"11         />12     <TextView 13         android:id="@+id/et_number"14         android:layout_width="match_parent"15         android:layout_height="wrap_content"16         />17 18 </LinearLayout>

java代碼:

 1 package com.example.smssender; 2  3 import java.util.List; 4  5 import android.app.Activity; 6 import android.content.ContentResolver; 7 import android.content.Intent; 8 import android.database.Cursor; 9 import android.net.Uri;10 import android.os.Bundle;11 import android.view.View;12 import android.view.ViewGroup;13 import android.widget.AdapterView;14 import android.widget.AdapterView.OnItemClickListener;15 import android.widget.BaseAdapter;16 import android.widget.ListView;17 import android.widget.TextView;18 19 public class ContactActivity extends Activity {20 21     private ListView lv_contact;22     private List<contactInfo> infos = null;23     @Override24     protected void onCreate(Bundle savedInstanceState) {25         26         // TODO Auto-generated method stub27         super.onCreate(savedInstanceState);28         setContentView(R.layout.activity_contact);29         30         infos = ContactService.getContactAll(this);31         32         lv_contact = (ListView)findViewById(R.id.lv_contact);33         lv_contact.setAdapter(new ContactAdapter());34         35         lv_contact.setOnItemClickListener(new OnItemClickListener() {36 37             @Override38             public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,39                     long arg3) {40                 // TODO Auto-generated method stub41                 contactInfo info = infos.get(arg2);42                 String number = info.getNumber();43                 Intent data = new Intent();44                 data.putExtra("number", number);45                 setResult(0, data);46                 //關閉當前activity,把資料傳回給它的啟用者47                 finish();48                 49             }50             51         });52     }53     54     private class ContactAdapter extends BaseAdapter{55 56         @Override57         public int getCount() {58             // TODO Auto-generated method stub59             return infos.size();60         }61 62         @Override63         public Object getItem(int arg0) {64             // TODO Auto-generated method stub65             return null;66         }67 68         @Override69         public long getItemId(int arg0) {70             // TODO Auto-generated method stub71             return 0;72         }73 74         @Override75         public View getView(int arg0, View arg1, ViewGroup arg2) {76             // TODO Auto-generated method stub77             contactInfo info = infos.get(arg0);78             View view = View.inflate(ContactActivity.this, R.layout.contact_item, null);79             TextView et_username = (TextView)view.findViewById(R.id.et_username);80             et_username.setText(info.getUsername());81             82             TextView et_number = (TextView)view.findViewById(R.id.et_number);83             et_number.setText(info.getNumber());        84             85             return view;86         }87         88     }89 90 }