1. 视图示例， 按选择弹出 2界面， 选择选项  回显到1

  

2. 示例代码

MainActivity.java， 第一个activity

public class MainActivity extends Activity {	private EditText et_number;	private EditText et_number2;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		et_number = (EditText) findViewById(R.id.et_number);		et_number2 = (EditText) findViewById(R.id.et_number2);	}	/**	 * 激活一个新的界面 让用户选择联系人	 * 	 * @param view	 */	public void selectContact(View view) {		Intent intent = new Intent(this, SelectContactActivity.class);		// 开启一个新的activity		// startActivity(intent);		// 开启一个新的activity 并且获取这个新开启的activity执行完毕后返回的结果		startActivityForResult(intent, 1);	}	/**	 * 激活一个新的界面 让用户选择第二个联系人	 * 	 * @param view	 */	public void selectContact2(View view) {		Intent intent = new Intent(this, SelectContactActivity.class);		// 开启一个新的activity		// startActivity(intent);		// 开启一个新的activity 并且获取这个新开启的activity执行完毕后返回的结果		startActivityForResult(intent, 2);	}	// 当新开启的activity 关闭的时候 调用的方法.	@Override	protected void onActivityResult(int requestCode, int resultCode, Intent data) {		System.out.println("onActivityResult");		if (data != null) {			String number = data.getStringExtra("number");			if (requestCode == 1) {				et_number.setText(number);			}else if(requestCode==2){				et_number2.setText(number);			}		}		super.onActivityResult(requestCode, resultCode, data);	}}

SelectContactActivity.java 第二个activity

public class SelectContactActivity extends Activity {	private ListView lv_select_contact;	private List
    
      contactInfos;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_select_contact);		lv_select_contact = (ListView) findViewById(R.id.lv_select_contact);		contactInfos = ContactInfoService.getContactInfos(this);		lv_select_contact.setAdapter(new ContactAdapter());				//给listview的条目设置 一下点击事件		lv_select_contact.setOnItemClickListener(new OnItemClickListener() {			@Override			public void onItemClick(AdapterView
      arg0, View arg1, int position,					long arg3) {				ContactInfo info = contactInfos.get(position);				String number = info.getNumber();								//传递数据给调用他的activity				Intent data = new Intent();				data.putExtra("number", number);				setResult(100, data);								//关闭当前的activity 然后传递数据给 调用者 调用者就会执行 onactivityResult的方法				finish();			}		});			}			private class ContactAdapter extends BaseAdapter{		@Override		public int getCount() {			return contactInfos.size();		}		@Override		public Object getItem(int position) {			return null;		}		@Override		public long getItemId(int position) {			return 0;		}		@Override		public View getView(int position, View convertView, ViewGroup parent) {			ContactInfo info = contactInfos.get(position);			View view = View.inflate(getApplicationContext(), R.layout.contact_item, null);			TextView tv_name = (TextView) view.findViewById(R.id.tv_contact_name);			TextView tv_number = (TextView) view.findViewById(R.id.tv_contact_number);			tv_name.setText(info.getName());			tv_number.setText(info.getNumber());			return view;		}			}	}
    

ContactInfoService.java, 从db获取所有联系人信息

public class ContactInfoService {	/**	 * 返回系统所有的联系人的信息	 * @return	 */	public static List
    
      getContactInfos(Context context){		//创建一个系统所有联系人的集合		List
     
       contactInfos = new ArrayList
      
       ();		ContentResolver resolver = context.getContentResolver();		// raw_contact 表的uri		Uri uri = Uri.parse("content://com.android.contacts/raw_contacts");		// data 表的uri		Uri dataUri = Uri.parse("content://com.android.contacts/data");		Cursor cursor = resolver.query(uri, new String[] { "contact_id" },				null, null, null);		while (cursor.moveToNext()) {			String id = cursor.getString(0);			if (id != null) {				Cursor dataCursor = resolver.query(dataUri, new String[] {						"data1", "mimetype" }, "raw_contact_id=?",						new String[] { id }, null);				ContactInfo contactInfo = new ContactInfo();				while (dataCursor.moveToNext()) {					String data = dataCursor.getString(0);					String mimetype = dataCursor.getString(1);					if("vnd.android.cursor.item/name".equals(mimetype)){						contactInfo.setName(data);					}else if("vnd.android.cursor.item/phone_v2".equals(mimetype)){						contactInfo.setNumber(data);					}				}				contactInfos.add(contactInfo);				dataCursor.close();			}		}		cursor.close();		return contactInfos;	}}
      
     
    

ContactInfo.java， 联系人javabean

public class ContactInfo {	private String name;	private String number;	public String getName() {		return name;	}	public void setName(String name) {		this.name = name;	}	public String getNumber() {		return number;	}	public void setNumber(String number) {		this.number = number;	}	}

activity_main.xml, 第一个activity布局

activity_select_contact.xml， 第二个activity布局

contact_item.xml， ListView布局

AndroidManifest.xml