果然是因为leancloud没有支付功能

1 AndroidManifest.xml中
加入 如下代码：
（1）
<pre><code><activity
android:name="c.b.a.A"
android:configChanges="orientation|keyboardHidden|navigation"
android:exported="false"
android:screenOrientation="behind"
android:windowSoftInputMode="adjustResize|stateHidden" />

<activity
android:name="c.b.a.B"
android:screenOrientation="portrait"
android:theme="@android:style/Theme.Translucent" /></code></pre>
（2）

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<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" />

然后在 activity中加入bmob的appid：

String APPID = "ID";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
BP.init(this, APPID);

tv = (TextView)findViewById(R.id.textview);
order = (TextView)findViewById(R.id.order);
payByAli();
}

// 调用支付宝支付

void payByAli() {
    //showDialog("正在获取订单...");
    final String name = "name";

    tv.append("正在获取订单...");
    // BmobPay.init(this, APPID);

    BP.pay(this, name, "body", 0.02, true, new PListener() {

        // 因为网络等原因,支付结果未知(小概率事件),出于保险起见稍后手动查询
        @Override
        public void unknow() {
            Toast.makeText(MainActivity.this, "支付结果未知,请稍后手动查询",
                    Toast.LENGTH_SHORT).show();
            tv.append(name + "'s pay status is unknow\n\n");
            //hideDialog();
        }

        // 支付成功,如果金额较大请手动查询确认
        @Override
        public void succeed() {
            Toast.makeText(MainActivity.this, "支付成功!", Toast.LENGTH_SHORT)
                    .show();
            tv.append(name + "'s pay status is success\n\n");
            //hideDialog();
        }

        // 无论成功与否,返回订单号
        @Override
        public void orderId(String orderId) {
            // 此处应该保存订单号,比如保存进数据库等,以便以后查询
            order.setText(orderId);
            tv.append(name + "'s orderid is " + orderId + "\n\n");
            //showDialog("获取订单成功!请等待跳转到支付页面~");
        }

        // 支付失败,原因可能是用户中断支付操作,也可能是网络原因
        @Override
        public void fail(int code, String reason) {
            Toast.makeText(MainActivity.this, "支付中断!", Toast.LENGTH_SHORT)
                    .show();
            tv.append(name + "'s pay status is fail, error code is " + code
                    + " ,reason is " + reason + "\n\n");
            //hideDialog();
        }
    });
}