Merge pull request #2217 from wuhengxin/master

#6 #934 实验6

Soft1614080902237/app/src/main/java/com/example/john/soft1614080902237/M1Activity.java

@@ -1,13 +1,37 @@
 package com.example.john.soft1614080902237;
 
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
 
 public class M1Activity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_m1);
+        //获取控件
+        Button btnLogin=(Button)findViewById(R.id.btn_login);
+        final EditText EdPassword=(EditText) findViewById(R.id.Ed_Password);
+        final EditText EdUserName=(EditText)findViewById(R.id.Ed_UserName);
+
+        btnLogin.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+               SharedPreferences sharedPreferences = getSharedPreferences("jzc", Context.MODE_PRIVATE);//创建SharedPreferences对象
+                SharedPreferences.Editor editor = sharedPreferences.edit(); //需要获取SharedPreferences的编辑对象
+                editor.putString("username", EdUserName.getText().toString()); //向preferences写入数据：
+                editor.putString("Password", EdPassword.getText().toString());
+                editor.commit();// 向preferences文件中提交数据：
+                Intent intent=new Intent(M1Activity.this,M4Activity.class);
+                startActivity(intent);
+            }
+        } );
     }
 }
+

Soft1614080902237/app/src/main/java/com/example/john/soft1614080902237/M3Activity.java

@@ -40,7 +40,7 @@ public void onClick(View v) {
         buttonque.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                Intent intent=new Intent(M3Activity.this,M6Activity.class);
+                Intent intent=new Intent(M3Activity.this,M7Activity.class);
                 startActivity(intent);
             }
         });

Soft1614080902237/app/src/main/java/com/example/john/soft1614080902237/M6Activity.java

@@ -1,13 +1,67 @@
 package com.example.john.soft1614080902237;
 
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLConnection;
 
 public class M6Activity extends AppCompatActivity {
 
+    private ImageView imageView;
+        //获取图片
+    public Bitmap getPicture(String wu){
+        Bitmap yu=null;
+        try{
+            URL url=new URL(wu);
+            URLConnection connection=url.openConnection();
+            connection.connect();
+            InputStream inputStream=connection.getInputStream();
+            yu= BitmapFactory.decodeStream(inputStream);
+        } catch (java.net.MalformedURLException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return  yu;
+    }
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_m6);
+        imageView = (ImageView) findViewById(R.id.add_image);
+        TextView txtUserName=(TextView) findViewById(R.id.txt_User);
+        SharedPreferences sharedPreferences = getSharedPreferences("jnc", Context.MODE_PRIVATE); //创建SharedPreferences对象
+        final String userName=sharedPreferences.getString("username","");//根据key获取对应的数据
+        txtUserName.setText(userName);
+        new Thread(new Runnable() {
+            @Override
+            public void run() {
+                final Bitmap bitmap=getPicture(userName);
+                //final Bitmap bitmap=getPicture("http://pic36.photophoto.cn/20150704/0017029369483757_b.jpg");
+                try {
+                    Thread.sleep(1997);
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+
+                imageView.post(new Runnable() {
+                    @Override
+                    public void run() {
+                        imageView.setImageBitmap(bitmap);
+                    }
+                });
+            }
+        }).start();
     }
 }

Soft1614080902237/app/src/main/java/com/example/john/soft1614080902237/M7Activity.java

@@ -0,0 +1,38 @@
+package com.example.john.soft1614080902237;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+
+public class M7Activity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_m7);
+        final EditText editText=(EditText)findViewById(R.id.edit_text);
+        //获取控件
+        Button btnLogin=(Button)findViewById(R.id.xiazai);
+       // Button buttonque=(Button)findViewById(R.id.queding);
+        //final EditText EdPassword=(EditText) findViewById(R.id.edit_text);
+        final EditText EdUserName=(EditText)findViewById(R.id.edit_text);
+
+        btnLogin.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                SharedPreferences sharedPreferences = getSharedPreferences("jnc", Context.MODE_PRIVATE);//创建SharedPreferences对象
+                SharedPreferences.Editor editor = sharedPreferences.edit(); //需要获取SharedPreferences的编辑对象
+                editor.putString("username", editText.getText().toString()); //向preferences写入数据：
+                //editor.putString("Password", EdPassword.getText().toString());
+                editor.commit();// 向preferences文件中提交数据：
+                Intent intent=new Intent(M7Activity.this,M6Activity.class);
+                startActivity(intent);
+            }
+        } );
+    }
+}

Soft1614080902237/app/src/main/res/layout/activity_m3.xml

@@ -26,11 +26,13 @@
             android:maxLength="40"
             android:textColorHint="#238745" />
 
+
+
         <Button
             android:id="@+id/queding"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="确定" />
+            android:text="下载图片" />
 
         <Button
             android:id="@+id/chaxun"

Soft1614080902237/app/src/main/res/layout/activity_m6.xml

@@ -1,9 +1,31 @@
-<?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".M6Activity">
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
+    android:layout_height="match_parent" android:paddingLeft="@dimen/fab_margin"
+    android:paddingRight="@dimen/fab_margin"
+    android:paddingTop="@dimen/fab_margin"
+    android:paddingBottom="@dimen/fab_margin"
+    tools:context="com.example.john.soft1614080902237.M6Activity">
 
-</android.support.constraint.ConstraintLayout>
+    <ImageView
+
+        android:id="@+id/add_image"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true"
+        ></ImageView>
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8sp"
+        android:layout_marginLeft="30sp"
+        android:text="图片网址为："
+        android:textSize="40px"/>
+
+    <TextView
+        android:id="@+id/txt_User"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8sp"
+        android:layout_marginLeft="150sp"
+        android:textSize="40px"/>
+</RelativeLayout>

Soft1614080902237/app/src/main/res/layout/activity_m7.xml

@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".M7Activity">
+
+    <LinearLayout
+        android:id="@+id/linearLayout2"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:orientation="vertical"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+
+    <EditText
+        android:id="@+id/edit_text"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="10sp"
+        android:layout_marginEnd="10dp"
+        android:layout_marginLeft="10dp"
+        android:layout_marginRight="10dp"
+        android:layout_marginStart="10dp"
+        android:hint="请输入下载的图片网址"
+        android:maxLength="400"
+        android:textColorHint="#238745"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="@+id/linearLayout2" />
+
+    <Button
+        android:id="@+id/xiazai"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="16dp"
+        android:layout_marginRight="16dp"
+        android:layout_marginTop="16dp"
+        android:text="下载"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/edit_text" />
+
+
+</android.support.constraint.ConstraintLayout>

Soft1614080902237/report6.md

@@ -0,0 +1,31 @@
+# 实验6：	Android网络编程
+
+## 一、实验内容
+
+### 1.从网络下载一个文件（图片、MP3、MP4）；
+
+### 2.保存到手机，在应用中使用文件；
+
+### 3.将应用运行结果截图。
+
+## 二、实验步骤
+
+### 1.首先将M3Activity中的BUTTON名称改为图片下载
+
+### 2.然后新建一个M7Activity来实现“图片下载的一个跳转”
+
+### 3.并从这个Activity新建一个按钮”下载“，实现跳转到M6Activity,并将TexView记录的图片网址传给M6Activity。
+
+### 4.在M6Activity实现接收网址并且从网上下载图片的功能。
+
+### 5.给AndroidManifest.xml添加联网权限。
+
+## 三、实验截图
+
+![image](https://github.com/wuhengxin/android-labs-2018/blob/master/Soft1614080902237/shiyan6.1.jpg?raw=true)
+
+![image](https://github.com/wuhengxin/android-labs-2018/blob/master/Soft1614080902237/shiyan6.2.jpg?raw=true)
+
+![image](https://github.com/wuhengxin/android-labs-2018/blob/master/Soft1614080902237/shiyan6.3.jpg?raw=true)
+
+![image](https://github.com/wuhengxin/android-labs-2018/blob/master/Soft1614080902237/shiyan6.4.jpg?raw=true)