Okhttp3使用问题处理
一、导入设置
implementation 'com.squareup.okhttp3:okhttp:3.10.0'二、使用
private void fillData()
{
String url =getString(R.string.serverurl);
OkHttpClient okHttpClient = new OkHttpClient();
final Request request = new Request.Builder()
.url(url)
.get()//默认就是GET请求，可以不写
.build();
final Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.i("onfail",e.getMessage());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
Response response = call.execute();
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Toast.makeText(NetworkActivity.this,call.toString()+e.getMessage(),Toast.LENGTH_SHORT).show();
Log.i("onfail",call.toString()+e.getMessage());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
Toast.makeText(NetworkActivity.this,request.body().toString(),Toast.LENGTH_SHORT).show();
Log.i("success",response.body().toString())；
}
}) } }); }
debug运行出现错误 Can't create handler inside thread that has not called Looper.prepare()
这是因为异步调用网络请求，主线程更新UII的结果（网上很多博客的例子都是官网的简单翻译而已，https://square.github.io/okhttp/）
处理思路：
方法1：需先在该线程中手动开启Looper（Looper.prepare()-->Looper.loop()），然后将其绑定到Handler对象上；
final Runnable runnable = new Runnable() {
@Override
public void run() {
//执行耗时操作
try {
Log.e("bm", "runnable线程： " + Thread.currentThread().getId()+ " name:" + Thread.currentThread().getName());
Thread.sleep(2000);
Log.e("bm", "执行完耗时操作了~");
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};
new Thread() {
public void run() {
Looper.prepare();
new Handler().post(runnable);//在子线程中直接去new 一个handler
Looper.loop(); //这种情况下，Runnable对象是运行在子线程中的，可以进行联网操作，但是不能更新UI
}
}.start();
修改fillData()为：
private void fillData()
{
String url =getString(R.string.serverurl);
OkHttpClient okHttpClient = new OkHttpClient();
final Request request = new Request.Builder()
.url(url)
.get()//默认就是GET请求，可以不写
.build();
final Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.i("onfail",e.getMessage());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
try(ResponseBody responseBody = response.body()) {
if (!response.isSuccessful())throw new IOException(("unexpected code"+response));
final String mstring = responseBody.string();
final Runnable runnable = new Runnable() {
@Override
public void run() {
Toast.makeText(NetworkActivity.this, mstring,Toast.LENGTH_SHORT).show();
}
};
new Thread(){
public void run(){
new Handler(Looper.getMainLooper()).post(runnable);
}
}.start();
}
}
});
}