Android 微信分享

之前使用友盟社会化组件还有sharesdk，使用起来的确是简单了很多，但是自定义就差太多了，比如友盟，不能单独分享图片，只能是带链接的图片，而且图片不是大图，点击就是看链接，而不是直接看这张大图，有时候客户需要很奇葩，就得自己写。所以花点时间看看微信分享的示例程序，自己动手做一做。

package cn.net.xuefei.king;

import com.tencent.mm.sdk.openapi.IWXAPI;
import com.tencent.mm.sdk.openapi.SendMessageToWX;
import com.tencent.mm.sdk.openapi.WXAPIFactory;
import com.tencent.mm.sdk.openapi.WXMediaMessage;
import com.tencent.mm.sdk.openapi.WXTextObject;

import cn.net.xuefei.king.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {

    // IWXAPI 是第三方app和微信通信的openapi接口
    private IWXAPI api;
    // APP_ID 替换为你的应用从官方网站申请到的合法appId
    private static final String APP_ID = "";

    Button btn1;
    Button btn2;
    Button btn3;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // 通过WXAPIFactory工厂，获取IWXAPI的实例
        api = WXAPIFactory.createWXAPI(this, APP_ID, false);
        
        btn1 = (Button)findViewById(R.id.button1);
        btn1.setOnClickListener(new Button.OnClickListener()
        {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                RegisterApp();
            }
            
        }
        );
        
        btn2 = (Button)findViewById(R.id.button2);
        btn2.setOnClickListener(new Button.OnClickListener()
        {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                OpenWX();
            }
            
        }
        );
        
        btn3 = (Button)findViewById(R.id.button3);
        btn3.setOnClickListener(new Button.OnClickListener()
        {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                ShareText("分享文字测试",false);
            }
            
        }
        );
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    // 将该app注册到微信
    public void RegisterApp() {
        // 通过WXAPIFactory工厂，获取IWXAPI的实例
        api = WXAPIFactory.createWXAPI(this, APP_ID);

        // 将该app注册到微信
        api.registerApp(APP_ID);
    }

    // 打开微信
    public void OpenWX() {
        api.openWXApp();
    }
    
    //分享文字，是否到朋友圈
    public void ShareText(String text, boolean isCircle)
    {
        if (text == null || text.length() == 0) {
            return;
        }
        
        // 初始化一个WXTextObject对象
        WXTextObject textObj = new WXTextObject();
        textObj.text = text;

        // 用WXTextObject对象初始化一个WXMediaMessage对象
        WXMediaMessage msg = new WXMediaMessage();
        msg.mediaObject = textObj;
        // 发送文本类型的消息时，title字段不起作用
        // msg.title = "Will be ignored";
        msg.description = text;

        // 构造一个Req
        SendMessageToWX.Req req = new SendMessageToWX.Req();
        req.transaction = buildTransaction("text"); // transaction字段用于唯一标识一个请求
        req.message = msg;
        req.scene = isCircle ? SendMessageToWX.Req.WXSceneTimeline : SendMessageToWX.Req.WXSceneSession;
        
        // 调用api接口发送数据到微信
        api.sendReq(req);
        finish();
    }
    
    private String buildTransaction(final String type) {
        return (type == null) ? String.valueOf(System.currentTimeMillis()) : type + System.currentTimeMillis();
    }
}

package cn.net.xuefei.king.wxapi;

import com.tencent.mm.sdk.openapi.BaseReq;
import com.tencent.mm.sdk.openapi.BaseResp;
import com.tencent.mm.sdk.openapi.IWXAPIEventHandler;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

public class WXEntryActivity extends Activity implements IWXAPIEventHandler {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public void onReq(BaseReq req) {
        // TODO Auto-generated method stub
        Log.v("Unity", req.getType() + "");
        Toast.makeText(this, req.getType() + "", Toast.LENGTH_LONG).show();
    }

    @Override
    public void onResp(BaseResp resp) {
        // TODO Auto-generated method stub
        Log.v("Unity", resp.errCode + "");
        Toast.makeText(this, resp.errCode + "", Toast.LENGTH_LONG).show();
    }

}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="cn.net.xuefei.king"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="14" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="cn.net.xuefei.king.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="cn.net.xuefei.king.wxapi.WXEntryActivity"
            android:exported="true"
            android:label="@string/app_name" />
        
        <receiver
            android:name="cn.net.xuefei.king.wxapi.WXEntryActivity"
            android:permission="com.tencent.mm.plugin.permission.SEND" >
            <intent-filter>
                <action android:name="com.tencent.mm.plugin.openapi.Intent.ACTION_REFRESH_WXAPP" />
            </intent-filter>
        </receiver>
    </application>

</manifest>