前提：手机里要有qq软件

1.先去这个网址把自己的qq设置成推广功能。​​

2.代码实现：

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    tools:context=".MainActivity">

    <Button
        android:layout_below="@+id/myte"
        android:id="@+id/bt_1"
        android:layout_marginTop="50dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="QQ客服"
        />

</RelativeLayout>
public class MainActivity extends AppCompatActivity {
 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

         Button bt1=(Button)findViewById(R.id.bt_1);
        bt1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //发起qq咨询
                if(isQQClientAvailable(MainActivity.this)){
                    final String qqUrl = "mqqwpa://im/chat?chat_type=wpa&uin=945750315&version=1";/*uin=945750315,把qq号换成你自己的*/
                    startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(qqUrl)));
                }else{
                    Toast.makeText(MainActivity.this,"请安装QQ客户端!",Toast.LENGTH_SHORT).show();
                }
            }
        });
        }

/**
     * 判断QQ客户端是否安装
     * @param context
     * @return
     */
    public static boolean isQQClientAvailable(Context context) {
        final PackageManager packageManager = context.getPackageManager();
        List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);
        if (pinfo != null) {
            for (int i = 0; i < pinfo.size(); i++) {
                String pn = pinfo.get(i).packageName;
                if (pn.equals("com.tencent.mobileqq")) {
                    return true;
                }
            }
        }
        return false;
    }

}

3.测试

安卓APP跳转qq客服_xml