Android应用中如何接入微信分享功能

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注册应用信息并下载必要工具

1. 在微信开放平台注册应用信息

2. 下载 签名生成工具获取待接入应用的签名

3. 应用信息填入签名

注意：由于一般调试签名和正式签名不一致，测试时可填入测试包的签名，上线时需要改为正式包的签名

接入

在build.gradle中，添加如下依赖：

dependencies {  compile 'com.tencent.mm.opensdk:wechat-sdk-android-with-mta:+'}

或：

dependencies {  compile 'com.tencent.mm.opensdk:wechat-sdk-android-without-mta:+'}

其中，前者包含统计功能

AndroidManifest.xml中添加权限和微信回调Activity

这里使用了一个透明的Activity来处理微信分享结果回调

主题：

Activity

当微信分享成功，点击返回App时，微信会主动调用WXEntryActivity，并将结果通过Intent传给WXEntryActivity，此时调用api.handleIntent(getIntent(), this)对结果进行处理，handleIntent第二个参数为IWXAPIEventHandler，分享结果会在onResp方法中处理，在这里我们发送一个广播，并在WXShare对象中对该广播进行监听

public class WXEntryActivity extends BaseActivity implements IWXAPIEventHandler {    private IWXAPI api;    @Override    protected void onCreate(Bundle savedInstanceState) {      super.onCreate(savedInstanceState);      Logger.i("WXEntryActivity");      WXShare share = new WXShare(this);      api = share  //        .register()          .getApi();      //注意：      //第三方开发者如果使用透明界面来实现WXEntryActivity，需要判断handleIntent的返回值，如果返回值为false，则说明入参不合法未被SDK处理，应finish当前透明界面，避免外部通过传递非法参数的Intent导致停留在透明界面，引起用户的疑惑      try {        if (!api.handleIntent(getIntent(), this)) {          finish();        }      } catch (Exception e) {        e.printStackTrace();      }    }    @Override    protected void onNewIntent(Intent intent) {      super.onNewIntent(intent);      Logger.i("onNewIntent");      setIntent(intent);      if (!api.handleIntent(intent, this)) {        finish();      }    }    @Override    public void onReq(BaseReq baseReq) {    }    @Override    public void onResp(BaseResp baseResp) {      Intent intent = new Intent(WXShare.ACTION_SHARE_RESPONSE);      intent.putExtra(WXShare.EXTRA_RESULT, new WXShare.Response(baseResp));      sendBroadcast(intent);      finish();    }  }

工具类

public class WXShare {    public static final String APP_ID = "wx0123456789";    public static final String ACTION_SHARE_RESPONSE = "action_wx_share_response";    public static final String EXTRA_RESULT = "result";    private final Context context;    private final IWXAPI api;    private OnResponseListener listener;    private ResponseReceiver receiver;    public WXShare(Context context) {      api = WXAPIFactory.createWXAPI(context, APP_ID);      this.context = context;    }    public WXShare register() {      // 微信分享      api.registerApp(APP_ID);      receiver = new ResponseReceiver();      IntentFilter filter = new IntentFilter(ACTION_SHARE_RESPONSE);      context.registerReceiver(receiver, filter);      return this;    }    public void unregister() {      try {        api.unregisterApp();        context.unregisterReceiver(receiver);      } catch (Exception e) {        e.printStackTrace();      }    }    public WXShare share(String text) {      WXTextObject textObj = new WXTextObject();      textObj.text = text;      WXMediaMessage msg = new WXMediaMessage();      msg.mediaObject = textObj;  //    msg.title = "Will be ignored";      msg.description = text;      SendMessageToWX.Req req = new SendMessageToWX.Req();      req.transaction = buildTransaction("text");      req.message = msg;      req.scene = SendMessageToWX.Req.WXSceneSession;      boolean result = api.sendReq(req);      Logger.i("text shared: " + result);      return this;    }    public IWXAPI getApi() {      return api;    }    public void setListener(OnResponseListener listener) {      this.listener = listener;    }    private String buildTransaction(final String type) {      return (type == null) ? String.valueOf(System.currentTimeMillis()) : type + System.currentTimeMillis();    }    private class ResponseReceiver extends BroadcastReceiver {      @Override      public void onReceive(Context context, Intent intent) {        Response response = intent.getParcelableExtra(EXTRA_RESULT);        Logger.d("type: " + response.getType());        Logger.d("errCode: " + response.errCode);        String result;        if (listener != null) {          if (response.errCode == BaseResp.ErrCode.ERR_OK) {            listener.onSuccess();          } else if (response.errCode == BaseResp.ErrCode.ERR_USER_CANCEL) {            listener.onCancel();          } else {            switch (response.errCode) {              case BaseResp.ErrCode.ERR_AUTH_DENIED:                result = "发送被拒绝";                break;              case BaseResp.ErrCode.ERR_UNSUPPORT:                result = "不支持错误";                break;              default:                result = "发送返回";                break;            }            listener.onFail(result);          }        }      }    }    public static class Response extends BaseResp implements Parcelable {      public int errCode;      public String errStr;      public String transaction;      public String openId;      private int type;      private boolean checkResult;      public Response(BaseResp baseResp) {        errCode = baseResp.errCode;        errStr = baseResp.errStr;        transaction = baseResp.transaction;        openId = baseResp.openId;        type = baseResp.getType();        checkResult = baseResp.checkArgs();      }      @Override      public int getType() {        return type;      }      @Override      public boolean checkArgs() {        return checkResult;      }      @Override      public int describeContents() {        return 0;      }      @Override      public void writeToParcel(Parcel dest, int flags) {        dest.writeInt(this.errCode);        dest.writeString(this.errStr);        dest.writeString(this.transaction);        dest.writeString(this.openId);        dest.writeInt(this.type);        dest.writeByte(this.checkResult ? (byte) 1 : (byte) 0);      }      protected Response(Parcel in) {        this.errCode = in.readInt();        this.errStr = in.readString();        this.transaction = in.readString();        this.openId = in.readString();        this.type = in.readInt();        this.checkResult = in.readByte() != 0;      }      public static final Creator CREATOR = new Creator() {        @Override        public Response createFromParcel(Parcel source) {          return new Response(source);        }        @Override        public Response[] newArray(int size) {          return new Response[size];        }      };    }  }

接口

public interface OnResponseListener {  void onSuccess();  void onCancel();  void onFail(String message);}

使用

在需要使用微信分享的Activity中：

@Overrideprotected void onCreate(Bundle savedInstanceState) {  wxShare = new WXShare(this);  wxShare.setListener(new OnResponseListener() {    @Override    public void onSuccess() {      // 分享成功    }    @Override    public void onCancel() {      // 分享取消    }    @Override    public void onFail(String message) {      // 分享失败    }  });}@Overrideprotected void onStart() {  super.onStart();  wxShare.register();}@Overrideprotected void onDestroy() {  wxShare.unregister();  super.onDestroy();}

启动分享

wxShare.share("这是要分享的文字");

到这里微信分享就完成啦！

另外，在微信官方例程中，有个定时刷新应用注册信息的receiver

AndroidManifest.xml中添加:

代码：

public class AppRegister extends BroadcastReceiver {  @Override  public void onReceive(Context context, Intent intent) {    final IWXAPI api = WXAPIFactory.createWXAPI(context, null);    // 将该app注册到微信    api.registerApp(WXShare.APP_ID);  }}

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