//Only the original thread that created a view hierarchy can touch its views.
//Cannot update UI in non-UI thread
public class MainActivity extends AppCompatActivity {
private Handler handler;
@BindView(R.id.get_btn)
Button get_btn;
@BindView(R.id.post_btn)
Button post_btn;
@BindView(R.id.result_view)
TextView result_view;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
//handler of the main thread
handler = new Handler ();
}
@OnClick(R.id.get_btn)
public void getMsg(){
doGet();
}
@OnClick(R.id.post_btn)
public void postMsg(){
}
public void doGet(){
//Create okhttpClient object
OkHttpClient okhttpClient = new OkHttpClient();
//build Request
Request.Builder builder = new Request.Builder();
Request request = builder.get().url("https://www.baidu.com").build();
//Encapsulate Request as Call
Call call = okhttpClient.newCall(request);
//Execute Call
//Asynchronous execution provides callback interface
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Toast.makeText(MainActivity.this, "The network is not good", Toast.LENGTH_SHORT).show();
}
@Override
public void onResponse(Call call, Response response) throws IOException {
final String string = response.body().string();
// Only the original thread that created a view hierarchy can touch its views.
//result_view.setText(string);
new Thread(){
@Override
public void run() {
handler.post(new Runnable() {
@Override
public void run() {
result_view.setText(string);
}
});
}
}.start();
}
});
}
}