Android Activity提供服务(被调用Activity 给调用Activity 反回数据)

 

 

网上看了小例子、

现在自己整理一下子：

 

现在想实现一个

Activity1   调用   Activity2   然后 Activity2返回数据给Activity1

 

流程:

1、Activity1 启动Activity2  设置返回码和重写onActivityResult

2、Activity2 完成操作后 返加activity 并传入值

3、Activity1 onActivityResult 里就可以得到Activity2传进来的值。

 

例子:选择电话号码并返回例子。

 

Activity1

layout  layout_activity_return_test.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="center"
    android:orientation="vertical" >


    <TextView
        android:id="@+id/showTextViewId"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="onclick"
        android:text="返回数据" />

</LinearLayout>

 Activity IntentReturnTest.java

package com.main;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class IntentReturnTest extends Activity {
	private TextView text;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.layout_activity_return_test);
		
		text = (TextView) findViewById(R.id.showTextViewId);
	}
	
	public void onclick(View view){
		Intent intent = new Intent();
        intent.setClass(IntentReturnTest.this, GetContentResolverActivity.class);
        startActivityForResult(intent, 1);//返回时提供识别 
	}
	
	
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		switch(requestCode){
		case 1:
			text.setText("---|"+data.getStringExtra("msg")+"---|");
			break;
		}
		
		
		
		
	}
}

 

 

Activity2

layout   layout_get_content_resolver.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ListView
        android:id="@+id/showContentListView"
        android:layout_height="wrap_content"
        android:layout_width="fill_parent" >
    </ListView>

</LinearLayout>

 

Activity2 类

package com.main;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.Contacts;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class GetContentResolverActivity extends Activity {
	private List<String> items;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.layout_get_content_resolver);
		
		ListView listView = (ListView) findViewById(R.id.showContentListView);
		
		items = new ArrayList<String>();
		Cursor cursor = getContentResolver().query(Contacts.Phones.CONTENT_URI,null,null,null,null);
		while(cursor.moveToNext()){
			String name = cursor.getString(cursor.getColumnIndex(Contacts.Phones.NAME));
			String number = cursor.getString(cursor.getColumnIndex(Contacts.Phones.NUMBER));
			items.add(name+":"+number);
		}
		cursor.close();
		
		ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 ,items);
		listView.setAdapter(adapter);

		listView.setOnItemClickListener(new OnItemClickListener() {
			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				Log.i("test", items.get(position));
				Intent intent = getIntent();
				intent.putExtra("msg", items.get(position));
				GetContentResolverActivity.this.setResult(RESULT_OK,intent);
				GetContentResolverActivity.this.finish();
			}
		});
	}
}

 

 

添加权限

    <!-- 读取联系人权限 -->
    <uses-permission android:name="android.permission.READ_CONTACTS" />

 

 

注册Activity

    <application
        android:icon="@drawable/image_button"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".IntentReturnTest" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".GetContentResolverActivity" >
        </activity>
    </application>

 

 

好ok 完成 。

附件 apk