package com.lidaochen.test; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.EditText; import android.widget.ImageView; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; public class MainActivity extends AppCompatActivity { private EditText et_path; private ImageView iv_pic; // 创建handler对象 public Handler handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); Bitmap bitmap = (Bitmap)msg.obj; // 设置图片到ImageView iv_pic.setImageBitmap(bitmap); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // 找到 ImageView 和 EditText控件 et_path = (EditText)findViewById(R.id.et_path); iv_pic = (ImageView)findViewById(R.id.iv_pic); } public void click(View v) { new Thread() { public void run() { try { // 获取图片路径 String path = et_path.getText().toString().trim(); // 创建url对象 URL url = new URL(path); // 获取HttpURLConnection对象 HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection(); // 设置请求方式 httpURLConnection.setRequestMethod("GET"); // 设置超时时间 httpURLConnection.setReadTimeout(5000); // 获取服务器返回的状态码 int code = httpURLConnection.getResponseCode(); if (code == 200) { // 获取图片数据,不管什么数据,都是以流的形式返回 InputStream in = httpURLConnection.getInputStream(); // 通过位图工厂,获取位图 final Bitmap bitmap = BitmapFactory.decodeStream(in); // 创建MSG 对象 Message msg = new Message(); msg.obj = bitmap; handler.sendMessage(msg); } } catch (Exception e) { e.printStackTrace(); } } }.start(); } }