抓取网页内容例子

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    AsyncHttpClient client = new AsyncHttpClient();
    String url = "https://hao.360.cn";
    final TextView tv = (TextView)findViewById(R.id.st);
    client.get(url, new AsyncHttpResponseHandler() {
        @Override
        public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
            String result = new String(responseBody);
            Log.e("result:",result);
            tv.setText(result + "");
        }

        @Override
        public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {

        }
    });
}

<TextView
    android:id="@+id/st"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text=""
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

implementation 'com.loopj.android:android-async-http:1.4.9'