zengsn#6 the sixth report

Soft1613071002205/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="com.example.jeremy.soft1613071002205">
+
+    <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=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <activity
+            android:name="com.example.jeremy.soft1613071002205.主界面">
+
+        </activity>
+
+        <activity android:name="com.example.jeremy.soft1613071002205.DownloadActivity">
+
+        </activity>
+
+        <activity android:name="com.example.jeremy.soft1613071002205.Main2Activity">
+
+        </activity>
+
+        <activity
+            android:name="com.example.jeremy.soft1613071002205.User">
+
+        </activity>
+
+    </application>
+
+</manifest>

Soft1613071002205/main/java/com/example/jeremy/soft1613071002205/DownloadActivity.java

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+package com.example.jeremy.soft1613071002205;
+
+import android.app.Application;
+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.widget.Button;
+import android.widget.ImageView;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+public class DownloadActivity extends AppCompatActivity{
+    private static final String TAG = "MainActivity";
+    private Bitmap bitmap;
+    Handler handler=new Handler(){
+        @Override
+        public void handleMessage(Message msg) {
+            if(msg.what==111){
+                mShowImage.setImageBitmap(bitmap);
+            }
+        }
+    };
+    private ImageView mShowImage;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.download);
+        mShowImage = findViewById(R.id.show_image);
+        initButton();
+    }
+
+    private void initButton() {
+        Button startDownLoad = findViewById(R.id.start_btn);
+        startDownLoad.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                t.start();
+            }
+        });
+    }
+
+    //为了下载图片资源，开辟一个新的子线程
+    Thread t=new Thread(){
+        @Override
+        public void run() {
+            //下载图片的路径
+            String iPath="https://t" +
+                    "imgsa.baidu.com/timg?" +
+                    "image&quality=80&size=b9999_" +
+                    "10000&sec=1527778386587&di=8be823" +
+                    "0eaebdaeaa949d7b73357c2fa2&imgt" +
+                    "ype=0&src=http%3A%2F%2F5b0988e595225.cdn.so" +
+                    "hucs.com%2Fq_70%2Cc_zoom%2Cw_640%2Fimage" +
+                    "s%2F20180415%2Fb86096a5dac244ddbc8d9060eb68e1b0.jpeg";
+            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()+"/haha.jpg");
+                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();
+            }
+        };
+    };
+
+}

Soft1613071002205/main/java/com/example/jeremy/soft1613071002205/Main2Activity.java

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+package com.example.jeremy.soft1613071002205;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.widget.TextView;
+
+public class Main2Activity extends AppCompatActivity {
+    private TextView mTextViewGetUserName;
+    private TextView mTextViewGetPassword;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.mynews);
+        mTextViewGetUserName = (TextView) findViewById(R.id.textView2);
+        mTextViewGetPassword = (TextView) findViewById(R.id.textView3);
+        Bundle b = getIntent().getBundleExtra("data");
+        String getStringUserName = b.getString("username");
+        mTextViewGetUserName.setText(getStringUserName);
+        String getStringPassword = b.getString("password");
+        mTextViewGetPassword.setText(getStringPassword);
+
+
+    }
+}

Soft1613071002205/main/java/com/example/jeremy/soft1613071002205/MainActivity.java

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+package com.example.jeremy.soft1613071002205;
+
+
+import android.app.Activity;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+
+public class MainActivity extends AppCompatActivity {
+
+    private Button 登录;
+    private EditText 用户名;
+    private EditText 密码;
+    private SharedPreferences mSharePreferences;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        mSharePreferences = getSharedPreferences("data", MODE_PRIVATE);
+
+        用户名 = (EditText) findViewById(R.id.editText);
+        密码 = (EditText) findViewById(R.id.editText2);
+        //取出数据并渲染
+
+        登录 = (Button) findViewById(R.id.login);
+        登录.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                    String stringUsername = 用户名.getText().toString();
+                    String stringPassword = 密码.getText().toString();
+                    // 2. 调用SharedPreferences.edit()方法，返回SharedPreferences.Editor对象，用于写入数据；
+                    SharedPreferences.Editor editor = mSharePreferences.edit();
+                    //3. 调用SharedPreferences.Editor.putXxx(String key, xxx Value)方法以键值对的形式保存数据；
+                    editor.putString("user", stringUsername);
+                    editor.putString("password", stringPassword);
+                    // 4. 调用SharedPreferences.Editor.commit()方法提交数据。
+                    editor.commit();
+
+                    Intent intent = new Intent(MainActivity.this, User.class);
+                    Bundle bundle = new Bundle();
+                    bundle.putString("username", stringUsername);
+                    bundle.putString("password", stringPassword);
+                    intent.putExtra("data", bundle);
+
+                    startActivity(intent);
+            }
+
+        });
+    }
+}

Soft1613071002205/main/java/com/example/jeremy/soft1613071002205/User.java

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+package com.example.jeremy.soft1613071002205;
+
+import android.content.Intent;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+
+import java.util.Map;
+
+public class User extends AppCompatActivity {
+
+    private Button mReturnButton;
+    private Button download;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.mynews);
+        mReturnButton = (Button) findViewById(R.id.returnback);
+
+        Button download = findViewById(R.id.download);
+        download.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Intent i = new Intent(User.this, DownloadActivity.class);
+                startActivity(i);
+            }
+
+        });
+    }
+
+
+
+
+    public void back_to_login(View view) {
+        Intent intent3 = new Intent(User.this,MainActivity.class) ;
+        startActivity(intent3);
+        finish();
+    }
+
+
+
+
+
+}

Soft1613071002205/main/java/com/example/jeremy/soft1613071002205/主界面.java

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+package com.example.jeremy.soft1613071002205;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+
+public class 主界面 extends AppCompatActivity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.home);
+    }
+
+}

Soft1613071002205/main/java/com/example/jeremy/soft1613071002205/信息发布.java

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+package com.example.jeremy.soft1613071002205;
+
+
+import android.app.Activity;
+import android.content.Intent;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+
+public class 信息发布 extends AppCompatActivity {
+
+    private Button 信息发布;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.home);
+
+
+        信息发布 = (Button) findViewById(R.id.button);
+        信息发布.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intent = new Intent(信息发布.this,主界面.class);
+                startActivity(intent);
+            }
+
+        });
+        }
+    }

Soft1613071002205/main/res/layout/activity_main.xml

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+<?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:id="@+id/linearLayout"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <TextView
+        android:id="@+id/textView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:background="@drawable/homepage"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/textView2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="13dp"
+        android:layout_marginRight="13dp"
+        android:layout_marginTop="195dp"
+        android:text="welcome the part-time life!"
+        android:textSize="30sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <EditText
+        android:id="@+id/editText"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginLeft="48dp"
+        android:layout_marginStart="48dp"
+        android:hint="用户名"
+        android:textColorHint="#ff00ff"
+        android:textSize="20sp"
+        app:layout_constraintBaseline_toBaselineOf="@+id/editText2"
+        app:layout_constraintStart_toStartOf="@+id/textView" />
+
+    <EditText
+        android:id="@+id/editText2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginLeft="196dp"
+        android:layout_marginStart="196dp"
+        android:layout_marginTop="288dp"
+        android:hint="密码"
+        android:inputType="numberPassword"
+        android:textColorHint="#ff00ff"
+        android:textSize="20sp"
+        app:layout_constraintStart_toStartOf="@+id/textView"
+        app:layout_constraintTop_toTopOf="@+id/textView" />
+
+    <Button
+        android:id="@+id/login"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginLeft="216dp"
+        android:layout_marginStart="216dp"
+        android:layout_marginTop="356dp"
+        android:text="登录"
+        app:layout_constraintStart_toStartOf="@+id/textView"
+        app:layout_constraintTop_toTopOf="@+id/textView" />
+
+
+
+
+</android.support.constraint.ConstraintLayout>