#5 #6第五和第六次实验和报告。

Com1614080901214/app/src/main/java/edu/hzuapps/androidlabs/com1614080901214/Com1614080901214Activity.java

@@ -54,4 +54,5 @@ public boolean onOptionsItemSelected(MenuItem item) {
 
         return super.onOptionsItemSelected(item);
     }
+
 }

Com1614080901214/app/src/main/java/edu/hzuapps/androidlabs/com1614080901214/ThreeActivity.java

@@ -1,13 +1,89 @@
 package edu.hzuapps.androidlabs.com1614080901214;
 
-import android.support.v7.app.AppCompatActivity;
+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.support.v7.app.AppCompatActivity;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.ImageView;
 
 public class ThreeActivity extends AppCompatActivity {
 
-    @Override
+    private EditText editText;
+    private Button button;
+    private ImageView imageView;
+
+    private Bitmap bitmap;
+
+    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_three);
+
+
+        editText=(EditText) findViewById(R.id.editText2);
+        button=(Button) findViewById(R.id.button3);
+        imageView=(ImageView) findViewById(R.id.imageView5);
+
+
+        button.setOnClickListener(new OnClickListener() {
+            public void onClick(View arg0) {
+                new Thread(t).start();
+            }
+        });
     }
+
+
+    Thread t=new Thread(){
+        public void run() {
+
+            String iPath=editText.getText().toString();
+            try {
+
+                URL url=new URL(iPath);
+
+                InputStream inputStream=url.openStream();
+
+                bitmap=BitmapFactory.decodeStream(inputStream);
+                handler.sendEmptyMessage(111);
+                inputStream.close();
+
+
+                inputStream=url.openStream();
+                File file=new File(Environment.getExternalStorageDirectory()+"/haha.gif");
+                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();
+            }
+        };
+    };
 }

Com1614080901214/app/src/main/java/edu/hzuapps/androidlabs/com1614080901214/jumpActivity.java

@@ -1,33 +1,112 @@
 package edu.hzuapps.androidlabs.com1614080901214;
-
+import android.content.Context;
+import android.content.ContextWrapper;
 import android.content.Intent;
+import android.os.Build;
 import android.os.Bundle;
-import android.support.design.widget.FloatingActionButton;
-import android.support.design.widget.Snackbar;
+import android.os.Environment;
+import android.support.annotation.RequiresApi;
 import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
+import android.util.Log;
 import android.view.View;
 import android.widget.Button;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.Toast;
+import android.widget.Toolbar;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+
+import edu.hzuapps.androidlabs.*;
+
+import static android.provider.Telephony.Mms.Part.FILENAME;
+
 
 public class jumpActivity extends AppCompatActivity {
+    public static final String DIRECTORY = "demo";
+    public static final String FILENAME = "demo.txt";
+
+    public static final String TAG = jumpActivity.class.getSimpleName();
     private Button button;
 
+    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_jump);
         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
-        setSupportActionBar(toolbar);
+
         button=(Button)findViewById(R.id.button);
         button.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
-                Intent intent = new Intent(jumpActivity.this, ThreeActivity.class);
-                startActivity(intent);
+                String text = ((EditText) findViewById(R.id.editText)).getText().toString();
+                save(text);
 
             }
 
 
         });
+        ((Button) findViewById(R.id.button2)).setOnClickListener(new View.OnClickListener() {
+          @Override
+          public void onClick(View view) {
+          String text = ((EditText) findViewById(R.id.editText)).getText().toString();
+          read();
+          deleteFile(FILENAME);
+          Intent intent = new Intent(jumpActivity.this, ThreeActivity.class);
+          startActivity(intent);
+
+
+      }
+      }
+        );
     }
+    public void save(String text) {
+        FileOutputStream out = null;
+        BufferedWriter writer = null;
+        try {
+            out = openFileOutput("demo.txt", ContextWrapper.MODE_APPEND);
+            writer = new BufferedWriter(new OutputStreamWriter(out));
+            writer.write(text);
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally {
+            try {
+                if (writer != null) {
+                    writer.close();
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+        Toast.makeText(jumpActivity.this, "已保存", Toast.LENGTH_SHORT).show();
+    }
+
+
+    public void read() {
+        String content = "";
+        try {
+            FileInputStream fis = openFileInput("demo.txt");
+            byte[] buffer = new byte[fis.available()];
+            fis.read(buffer);
+            content = new String(buffer);
+            fis.close();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        Toast.makeText(jumpActivity.this, "查询结果：" + content, Toast.LENGTH_SHORT).show();
+
+    }
+
+
+
 }

Com1614080901214/app/src/main/res/layout/activity_jump.xml

@@ -5,35 +5,44 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context=".jumpActivity">
+
     <LinearLayout
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:orientation="horizontal">
 
 
+        app:layout_constraintBaseline_toBaselineOf="@+id/editText"
+
         <EditText
             android:id="@+id/editText"
-            android:layout_width="252dp"
+            android:layout_width="281dp"
             android:layout_height="wrap_content"
             android:layout_marginTop="16dp"
+            android:layout_weight="1"
             android:ems="10"
             android:hint="请输入你要查询天气的城市"
             android:inputType="textPersonName"
             app:layout_constraintEnd_toStartOf="@+id/button">
 
         </EditText>
 
-
         <Button
             android:id="@+id/button"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
+            android:layout_weight="1"
             android:onClick="sendMessage"
-            android:text="查询">
+            android:text="保存">
 
         </Button>
-        app:layout_constraintBaseline_toBaselineOf="@+id/editText"
 
+        <Button
+            android:id="@+id/button2"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="查询" />
     </LinearLayout>
 
 </android.support.design.widget.CoordinatorLayout>

Com1614080901214/app/src/main/res/layout/activity_three.xml

@@ -1,16 +1,38 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout 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=".ThreeActivity">
-    <TextView
-        android:id="@+id/textview_01"
+    android:orientation="vertical"
+   android:background="@drawable/tupian">
+
+    <EditText
+        android:id="@+id/editText2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentTop="true"
+        android:layout_centerHorizontal="true"
+        android:ems="10"
+        android:inputType="textPersonName"
+        android:text="输入url" />
+
+    <Button
+        android:id="@+id/button3"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:drawableTop="@drawable/jd"
-        tools:layout_editor_absoluteX="0dp"
-        tools:layout_editor_absoluteY="0dp" />
+        android:layout_alignParentTop="true"
+        android:layout_centerHorizontal="true"
+        android:layout_marginTop="87dp"
+        android:text="下载图片" />
+
+    <ImageView
+        android:id="@+id/imageView5"
+        android:layout_width="328dp"
+        android:layout_height="299dp"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentStart="true"
+        android:layout_marginBottom="37dp"
+        android:layout_marginStart="33dp" />
+
+</RelativeLayout>
 
-</android.support.constraint.ConstraintLayout>

Com1614080901214/report5.md

@@ -0,0 +1,24 @@
+一、实验目的
+掌握在Android App中存储数据;
+
+二、实验要求
+1.根据选题要求使用文件存储
+
+2.将应用产生的数据保存到文件存储中；
+
+3.说明使用的文件存储方式：内部 or 外部；
+
+4.将运行结果截图。
+
+三、实验步骤
+
+1.新增了两个类，一个用来实现新建歌单收藏功能，输入收藏单名，将输入的数据存储到文件中。另一个类用来从文件中读取收藏单名并显示出来。
+
+2.新增了这两个类相应的页面布局。
+
+四、实验结果
+https://github.com/quanquanCc/android-labs-2018/blob/master/Com1614080901214/%E5%AE%9E%E9%AA%8C5%E6%88%AA%E5%9B%BE.png
+https://github.com/quanquanCc/android-labs-2018/blob/master/Com1614080901214/%E5%AE%9E%E9%AA%8C5%E6%88%AA%E5%9B%BE2.png
+
+五、实验体会
+通过这次实验我掌握了如何在在Android App中存储数据，也掌握了将应用产生的数据保存到文件存储中，也加深了对布局设计的理解

Com1614080901214/report6.md

@@ -0,0 +1,11 @@
+第六次实验报告 
+                                         Android网络编程
+一、实验步骤
+1.修改AndroidManifest，加入必要的连接网络的权限。 
+2.创建activity_tp.java，其功能为完成图片的下载。 
+3.创建activity_tp.xml文件,实现图片的下载和显示
+二、实验结果截图   
+https://github.com/quanquanCc/android-labs-2018/blob/master/Com1614080901214/%E5%AE%9E%E9%AA%8C6%E6%88%AA%E5%9B%BE.jpg
+三、实验体会
+通过本次实验，我认识到当设置连接超时,如果网络不好,Android系统在超过默认时间会收回资源中断操作.还有就是在对大文件的操作时,要将文件写到SDCard上面,
+不要直接写到手机内存上。