效果图:
image.png
一 ,添加联网 权限
二, 添加 butterknife 快速点击事件
MainActivity中的代码
···
package com.example.wangye.androidxmlc_class12;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import butterknife.ButterKnife;
import butterknife.InjectView;
import butterknife.OnClick;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
public class MainActivity extends AppCompatActivity {
@InjectView(R.id.button)
Button btGet;
@InjectView(R.id.button2)
Button btPost;
@InjectView(R.id.button3)
Button btDown;
@InjectView(R.id.textView)
TextView textView;
@InjectView(R.id.imageView)
ImageView imageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.inject(this);
}
@OnClick({R.id.button, R.id.button2, R.id.button3})
public void onViewClicked(View view) {
switch (view.getId()) {
case R.id.button:
getDataByOKGet();
break;
case R.id.button2:
getDataByOKPost();
break;
case R.id.button3:
getDataByOKDown();
break;
}
}
public void getDataByOKGet(){
OkHttpClient okHttpClient = new OkHttpClient();
Request.Builder builder = new Request.Builder();
try {
Request request = builder
.get()
.url("http://apicloud.mob.com/environment/query?key=26b2b13b4b440&city="
+ URLEncoder.encode("哈尔滨","UTF-8")
+"&province="
+URLEncoder.encode("黑龙江","UTF-8"))
.build();
Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, final Response response) throws IOException {
runOnUiThread(new Thread(){
@Override
public void run() {
try {
textView.setText(response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
});
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
public void getDataByOKPost(){
try {
OkHttpClient okHttpClient = new OkHttpClient();
FormBody.Builder build = new FormBody.Builder();
RequestBody requestBody = build
// .add("city",URLEncoder.encode("哈尔滨","UTF-8"))
// .add("province",URLEncoder.encode("黑龙江","UTF-8"))
.add("key",URLEncoder.encode("26b2b13b4b440","UTF-8")).build();
Request.Builder builder = new Request.Builder();
Request request = builder
.post(requestBody)
.url("http://apicloud.mob.com/v1/postcode/pcd")
.build();
Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, final Response response) throws IOException {
final String s = response.body().string();
runOnUiThread(new Thread(){
@Override
public void run() {
try {
textView.setText(s);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
public void getDataByOKDown(){
try {
OkHttpClient okHttpClient = new OkHttpClient();
FormBody.Builder build = new FormBody.Builder();
RequestBody requestBody = build.build();
Request.Builder builder = new Request.Builder();
Request request = builder
.post(requestBody)
.url("http://pic2.sc.chinaz.com/files/pic/pic9/201808/zzpic13391.jpg")
.build();
Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, final Response response) throws IOException {
InputStream is = response.body().byteStream();
ByteArrayOutputStream bs = new ByteArrayOutputStream();
byte buffer[] = new byte[512];
int length = -1;
while( (length = is.read(buffer)) != -1 ){
bs.write(buffer,0,length);
bs.flush();
}
final File file = new File(
Environment.getExternalStorageDirectory()+"/1233.jpg");
FileOutputStream fs = new FileOutputStream(file);
byte data[] = bs.toByteArray();
fs.write(data,0,data.length);
fs.flush();
is.close();
bs.close();
fs.close();
runOnUiThread(new Thread(){
@Override
public void run() {
imageView.setImageBitmap(BitmapFactory.decodeFile(file.getAbsolutePath()));
}
});
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
···
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