微信支付 WXPayEntryActivity 具体代码

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public class WXPayEntryActivity extends Activity implements IWXAPIEventHandler {

    private static final String TAG = "MicroMsg.SDKSample.WXPayEntryActivity";

    private IWXAPI api;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        api = WXAPIFactory.createWXAPI(this, Constants.APP_ID);
        api.handleIntent(getIntent(), this);
    }

    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        setIntent(intent);
        api.handleIntent(intent, this);
    }

    @Override
    public void onReq(BaseReq req) {
    }

    @Override
    public void onResp(BaseResp resp) {
        if (resp.getType() == ConstantsAPI.COMMAND_PAY_BY_WX) {

            if (resp.errCode == 0) {
                finish();
            } else if (resp.errCode == -2) {
                Toast.makeText(this, "您已取消付款!", Toast.LENGTH_SHORT).show();
                finish();
            } else {
                Toast.makeText(this, "参数错误", Toast.LENGTH_SHORT).show();
                finish();
            }
        } else {
            finish();
        }
    }
}

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下载集成源码 https://github.com/benchegnzhou/demoWxPay