图片和文本网络接口练习
MainActivity.class联网权限package com.example.kanghuwei.day01;import android.graphics.Bitmap;import android.os.Handler;import android.os.Message;import android.support.v7.app.AppCompatActivity;i...
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MainActivity.class 联网权限
package com.example.kanghuwei.day01;
import android.graphics.Bitmap;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
private ImageView image_name;
private TextView text_name;
public String urlString = "http://api.expoon.com/AppNews/getNewsList/type/1/p/1";
String urlBitmap = "https://img-my.csdn.net/uploads/201407/26/1406383265_8550.jpg";
Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
if (msg.what == 1) {
Bitmap bitmap = (Bitmap) msg.obj;
image_name.setImageBitmap(bitmap);
} else if (msg.what == 2) {
text_name.setText((String) msg.obj);
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
image_name = findViewById(R.id.image_name);
text_name = findViewById(R.id.text_name);
image_name.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new Thread() {
@Override
public void run() {
super.run();
//调用工具类
Bitmap bitmap = NetWorkUtils.getBitmap(urlBitmap);
Message message = handler.obtainMessage();
message.obj = bitmap;
message.what = 1;
handler.sendMessage(message);
}
}.start();
}
});
text_name.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new Thread() {
@Override
public void run() {
super.run();
//调用工具类
try {
String json = NetWorkUtils.getJson(urlString);
Message message = handler.obtainMessage();
message.obj = json;
message.what = 2;
handler.sendMessage(message);
} catch (IOException e) {
e.printStackTrace();
}
}
}.start();
}
});
}
}
NetWorkUtils工具类
package com.example.kanghuwei.day01;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
public class NetWorkUtils {
public static Bitmap getBitmap(String urlBitmap) {
try {
URL url = new URL(urlBitmap);
try {
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
int responseCode = urlConnection.getResponseCode();
if (responseCode == 200) {
InputStream inputStream = urlConnection.getInputStream();
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
return bitmap;
} else {
Log.e("khw", "responseCode:" + responseCode);
}
} catch (IOException e) {
e.printStackTrace();
}
} catch (MalformedURLException e) {
e.printStackTrace();
}
return null;
}
public static String getJson(String urlString) throws IOException {
URL url = new URL(urlString);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
int responseCode = urlConnection.getResponseCode();
if (responseCode == 200) {
InputStream inputStream = urlConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String temp = "";
StringBuilder stringBuilder = new StringBuilder();
while ((temp = bufferedReader.readLine()) != null) {
stringBuilder.append(temp);
}
//错
return stringBuilder.toString();
} else {
Log.e("khw", "responseCode--json" + responseCode);
}
return "";
}
}
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