hzuapps#6 hzuapps#1439 实验6

com1614080901140/app/src/main/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.hzuapps.androidlabs.com1614080901140">
+
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <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=".Com1614080901140Activity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        <activity
+            android:name=".SecondActivity"
+            android:label="@string/title_activity_second"
+            android:theme="@style/AppTheme.NoActionBar" />
+        <activity
+            android:name=".ThirdActivity"
+            android:label="@string/title_activity_third"
+            android:theme="@style/AppTheme.NoActionBar"></activity>
+    </application>
+
+</manifest>

com1614080901140/app/src/main/java/edu/hzuapps/androidlabs/Com1614080901140/SecondActivity.java

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+package edu.hzuapps.androidlabs.com1614080901140;
+
+import android.os.Bundle;
+import android.support.design.widget.FloatingActionButton;
+import android.support.design.widget.Snackbar;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.view.View;
+
+
+import android.content.ContextWrapper;
+import android.widget.Button;
+import android.widget.EditText;
+import java.io.BufferedWriter;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import android.content.Intent;
+import android.widget.Toast;
+
+public class SecondActivity extends AppCompatActivity {
+
+    private Button nextbtn;
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_second);
+
+        ((Button) findViewById(R.id.btn_save)).
+
+                setOnClickListener(new View.OnClickListener() {
+                    @Override
+                    public void onClick(View v) {
+                        String text = ((EditText) findViewById(R.id.et_info)).getText().toString();
+                        save(text);
+                    }
+                });
+        ((Button) findViewById(R.id.btn_read)).
+
+                setOnClickListener(new View.OnClickListener() {
+                    @Override
+                    public void onClick(View v) {
+                        readsy5();
+                    }
+                });
+        nextbtn=(Button)findViewById(R.id.btn_t);
+        nextbtn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Intent intent=new Intent(SecondActivity.this,ThirdActivity.class);
+                startActivity(intent);
+            }
+        });
+
+    }
+
+    public void save(String text) {
+        FileOutputStream out = null;
+        BufferedWriter writer = null;
+        try {
+            out = openFileOutput("sy.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(SecondActivity.this, "订单保存成功", Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    public void readsy5() {
+        String content = "";
+        try {
+            FileInputStream fis = openFileInput("sy.txt");
+            byte[] buffer = new byte[fis.available()];
+            fis.read(buffer);
+            content = new String(buffer);
+            fis.close();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        Toast.makeText(SecondActivity.this, "您的订单号是" + content, Toast.LENGTH_SHORT).show();
+
+    }
+}

com1614080901140/app/src/main/java/edu/hzuapps/androidlabs/Com1614080901140/ThirdActivity.java

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+package edu.hzuapps.androidlabs.com1614080901140;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import android.os.AsyncTask;
+import android.os.Environment;
+import android.os.Handler;
+import android.os.Message;
+import android.app.Activity;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.Toast;
+
+
+public class ThirdActivity extends AppCompatActivity  implements OnClickListener{
+
+    Button content;
+    ImageView image;
+    Bitmap bitmap;
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_third);
+        content=(Button)findViewById(R.id.content);
+        image=(ImageView)findViewById(R.id.image);
+
+        content.setOnClickListener(this);;
+        image.setOnClickListener(this);;
+    }
+
+    public Bitmap GetImageInputStream(String imageurl){
+        URL url;
+        HttpURLConnection connection=null;
+        Bitmap bitmap=null;
+        try {
+            url = new URL(imageurl);
+            connection=(HttpURLConnection)url.openConnection();
+            connection.setConnectTimeout(6000);
+            connection.setDoInput(true);
+            connection.setUseCaches(false);
+            InputStream inputStream=connection.getInputStream();
+            bitmap=BitmapFactory.decodeStream(inputStream);
+            inputStream.close();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return bitmap;
+    }
+
+    public void onClick(View v) {
+        switch (v.getId()) {
+            case R.id.content:
+
+                new Task().execute("http://img.szhome.com/images/sznews/2012/07/20120703105442315.JPG");
+                break;
+
+            case R.id.image:
+
+                SavaImage(bitmap, Environment.getExternalStorageDirectory().getPath()+"/Test");
+                Toast.makeText(getBaseContext(), "图片保存", Toast.LENGTH_SHORT).show();
+                break;
+
+            default:
+                break;
+        }
+    }
+
+    Handler handler=new Handler(){
+        public void handleMessage(android.os.Message msg) {
+            if(msg.what==0x123){
+                image.setImageBitmap(bitmap);
+            }
+        };
+    };
+
+
+    class Task extends AsyncTask<String, Integer, Void>{
+
+        protected Void doInBackground(String... params) {
+            bitmap=GetImageInputStream((String)params[0]);
+            return null;
+        }
+
+        protected void onPostExecute(Void result) {
+            super.onPostExecute(result);
+            Message message=new Message();
+            message.what=0x123;
+            handler.sendMessage(message);
+        }
+
+    }
+
+    public void SavaImage(Bitmap bitmap, String path){
+        File file=new File(path);
+        FileOutputStream fileOutputStream=null;
+        if(!file.exists()){
+            file.mkdir();
+        }
+        try {
+            fileOutputStream=new FileOutputStream(path+"/"+System.currentTimeMillis()+".png");
+            bitmap.compress(Bitmap.CompressFormat.JPEG, 100,fileOutputStream);
+            fileOutputStream.close();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}

com1614080901140/app/src/main/res/layout/activity_second.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<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=".SecondActivity">
+
+    <EditText
+        android:id="@+id/et_info"
+        android:layout_width="wrap_content"
+        android:layout_height="46dp"
+        android:layout_centerHorizontal="true"
+        android:ems="10"
+        android:hint="请输入您的订单号"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.503"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.0" />
+    <requestFocus/>
+
+    <Button
+        android:id="@+id/btn_read"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+
+        android:layout_alignEnd="@+id/et_info"
+        android:layout_alignRight="@+id/et_info"
+        android:layout_below="@+id/et_info"
+        android:text="查看订单号"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="1.0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.134" />
+
+    <Button
+        android:id="@+id/btn_save"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignLeft="@+id/et_info"
+        android:layout_alignStart="@+id/et_info"
+        android:layout_below="@+id/et_info"
+        android:text="保存订单号"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.134" />
+
+    <Button
+        android:id="@+id/btn_t"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentEnd="true"
+        android:layout_alignParentRight="true"
+        android:layout_marginBottom="17dp"
+        android:layout_marginEnd="30dp"
+        android:layout_marginRight="30dp"
+        android:text="铁路路线"/>
+</RelativeLayout>

com1614080901140/app/src/main/res/layout/activity_third.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<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"
+        tools:context="edu.hzuapps.androidlabs.com1614080901140.ThirdActivity"
+        android:orientation="vertical"
+        >
+
+    <ImageView
+        android:id="@+id/image"
+        android:layout_width="fill_parent"
+        android:layout_height="450dp"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentStart="true"
+        android:layout_alignParentTop="true"
+        android:layout_marginTop="22dp" />
+
+    <Button
+        android:id="@+id/content"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentEnd="true"
+        android:layout_alignParentRight="true"
+        android:layout_marginBottom="20dp"
+        android:layout_marginEnd="68dp"
+        android:layout_marginRight="68dp"
+        android:background="#ff8c00"
+        android:text="路线查看" />
+
+</RelativeLayout>
+