Merge pull request #1689 from Peiweilu/master

#4 #219 实验四代码

students/com1709081602330/app/src/main/AndroidManifest.xml

@@ -9,8 +9,8 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".Com1709081602330Activity2"></activity>
-        <activity android:name=".Com1709081602330Activity">
+        <activity android:name=".Sports_sort"></activity>
+        <activity android:name=".MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

students/com1709081602330/app/src/main/java/edu/hzuapps/androidlabs/com1709081602330/MainActivity.java

@@ -0,0 +1,28 @@
+package edu.hzuapps.androidlabs.com1709081602330;
+
+import android.content.Intent;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import android.widget.Toast;
+
+public class MainActivity extends AppCompatActivity {
+    private Button select_sort;
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        Button select_sort =  (Button) findViewById(R.id.select_sort);
+        select_sort.setOnClickListener(new View.OnClickListener(){
+            @Override
+            public void onClick(View v){
+                Intent intent = new Intent(MainActivity.this,Sports_sort.class);
+                startActivity(intent);
+            }
+        });
+    }
+
+
+}

students/com1709081602330/app/src/main/java/edu/hzuapps/androidlabs/com1709081602330/Sports_sort.java

@@ -0,0 +1,92 @@
+package edu.hzuapps.androidlabs.com1709081602330;
+
+import android.content.Context;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.Toast;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+
+public class Sports_sort extends AppCompatActivity {
+    private Button basketball;
+    private Button football;
+    private Button tennis;
+    private EditText edit_add_sort;
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_sports_sort);
+        edit_add_sort = (EditText) findViewById(R.id.edit_add_sort);
+        String inputText = load();
+        if (!TextUtils.isEmpty(inputText)) {
+            edit_add_sort.setText(inputText);
+            edit_add_sort.setSelection(inputText.length());
+            Toast.makeText(this, "Restoring succeeded", Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    //文件存储数据
+    @Override
+    protected  void onDestroy(){
+        super.onDestroy();
+        String inputText = edit_add_sort.getText().toString();
+        save(inputText);
+    }
+    public void save(String inputText){
+        FileOutputStream out = null;
+        BufferedWriter writer = null;
+        try{
+            out = openFileOutput("data", Context.MODE_PRIVATE);
+            writer = new BufferedWriter(new OutputStreamWriter(out));
+            writer.write(inputText);
+        } catch (IOException e){
+            e.printStackTrace();
+        }finally{
+            try{
+                if (writer != null){
+                    writer.close();
+                }
+            }catch (IOException e){
+                e.printStackTrace();
+            }
+        }
+    }
+
+
+
+//读取数据
+    public  String load(){
+        FileInputStream in = null;
+        BufferedReader reader = null;
+        StringBuilder content = new StringBuilder();
+
+        try{
+            in = openFileInput("data");
+            reader = new BufferedReader(new InputStreamReader(in));
+            String line = "";
+            while ((line = reader.readLine()) != null){
+                content.append(line);
+            }
+        }catch(IOException e){
+            e.printStackTrace();
+        }finally {
+            if (reader != null){
+                try{
+                    reader.close();
+                }catch(IOException e){
+                    e.printStackTrace();
+                }
+            }
+        }
+        return content.toString();
+    }
+}

students/com1709081602330/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TableLayout 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=".MainActivity">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="体育比赛直播间"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+    <Button
+        android:id="@+id/select_sort"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="选择分类"
+        />
+    <ImageView
+        android:id="@+id/image_view"
+        android:layout_height="wrap_content"
+        android:layout_width="wrap_content"
+        android:src = "@drawable/img_1"
+        />
+
+
+</TableLayout>