hzuapps#6 hzuapps#1024 第六次实验

soft1614080902413/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="edu.androidlabs.soft1614080902413">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".InternetActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+        <uses-permission android:name="android.permission.INTERNET" />
+        <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+       <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+       <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
+       <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
+       <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
+</manifest>

soft1614080902413/java/edu/androidlabs/soft1614080902413/InternetActivity.java

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+package edu.androidlabs.soft1614080902413;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.os.Bundle;
+import android.os.Environment;
+import android.os.Handler;
+import android.os.Message;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.ImageView;
+public class InternetActivity extends Activity {
+
+    private EditText editText;
+    private Button button;
+    private ImageView imageView;
+
+    private Bitmap bitmap;
+    //手柄更新的作用
+    Handler handler=new Handler(){
+        public void handleMessage(Message msg) {
+            if(msg.what==111){
+                imageView.setImageBitmap(bitmap);
+            }
+        };
+    };
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_internet);
+
+        //初始化组件
+        editText=(EditText) findViewById(R.id.imagepath);
+        button=(Button) findViewById(R.id.upload);
+        imageView=(ImageView) findViewById(R.id.imageView);
+
+        //给下载按钮添加一个监听
+        button.setOnClickListener(new OnClickListener() {
+            public void onClick(View arg0) {
+                new Thread(t).start();//启动线程t
+            }
+        });
+    }
+
+    //为了下载图片资源，开辟一个新的子线程，线程名字为t
+    Thread t=new Thread(){
+        public void run() {
+            //下载图片的路径
+            String iPath=editText.getText().toString();
+            try {
+                //对资源链接
+                URL url=new URL(iPath);
+                //打开输入流
+                InputStream inputStream=url.openStream();
+                //对网上资源进行下载转换位图图片
+                bitmap=BitmapFactory.decodeStream(inputStream);
+                handler.sendEmptyMessage(111);
+                inputStream.close();
+
+                //再一次打开
+                inputStream=url.openStream();
+                File file=new File(Environment.getExternalStorageDirectory()+"/DCIM/");
+                FileOutputStream fileOutputStream=new FileOutputStream(file);
+                int hasRead=0;
+                while((hasRead=inputStream.read())!=-1){
+                    fileOutputStream.write(hasRead);
+                }
+                fileOutputStream.close();
+                inputStream.close();
+            } catch (MalformedURLException e) {
+                e.printStackTrace();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        };
+    };
+
+}

soft1614080902413/res/layout/activity_internet.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center">
+
+    <EditText
+        android:id="@+id/imagepath"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="输入图片url地址"
+        android:textColor="#AAAAAA"
+        />
+    <Button
+        android:id="@+id/upload"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="点击查看图片"
+        android:textColor="#1A2DED"
+        />
+    <ImageView
+        android:id="@+id/imageView"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        />
+
+</LinearLayout>