hzuapps#5 hzuapps#788 第5次实验

students/soft1714080902414/app/src/main/AndroidManifest.xml

@@ -9,13 +9,12 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".Soft1714080902414Activity2" />
-        <activity android:name=".Soft1714080902414Activity">
+        <activity android:name="edu.hzuapps.androidlabs.soft1714080902414.Soft1714080902414">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+
         </activity>
     </application>
 

students/soft1714080902414/app/src/main/java/edu/hzuapps/androidlabs/soft1714080902414/Soft1714080902414.java

@@ -0,0 +1,63 @@
+package edu.hzuapps.androidlabs.soft1714080902414;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.Toast;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+public class Soft1714080902414 extends AppCompatActivity implements View.OnClickListener {
+    private Button button1;
+    private Button button2;
+    private EditText editText1;
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        button1=(Button) findViewById(R.id.bt1);
+        button2=(Button) findViewById(R.id.bt2);
+        editText1=(EditText) findViewById(R.id.et1);
+        button1.setOnClickListener(this);
+        button2.setOnClickListener(this);
+        }
+
+    @Override
+    public void onClick(View view) {
+        switch (view.getId())
+        {
+            case R.id.bt1: String save=editText1.getText().toString().trim();
+            FileOutputStream fos;
+            try{
+                fos=openFileOutput("data.txt",MODE_PRIVATE);
+                fos.write(save.getBytes());
+                fos.close();
+            } catch (FileNotFoundException e) {
+                e.printStackTrace();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+                Toast.makeText( Soft1714080902414.this,"数据保存成功",Toast.LENGTH_SHORT).show();
+            break;
+            case R.id.bt2:   String content="";
+                try {
+                    FileInputStream fis=openFileInput("data.txt");
+                    byte[] buffer=new byte[fis.available()];
+                    fis.read(buffer);
+                    content=new String(buffer);
+                    fis.close();
+                } catch (FileNotFoundException e) {
+                    e.printStackTrace();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+                Toast.makeText(Soft1714080902414.this,"保存的数据为"+content,Toast.LENGTH_SHORT).show();
+                break;
+        }
+    }
+}

students/soft1714080902414/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout 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"
+    android:orientation="vertical"
+    android:background="@color/background"
+    >
+    <EditText
+        android:id="@+id/et1"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+
+        android:text=""
+        />
+    <LinearLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+    <Button
+        android:id="@+id/bt1"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginLeft="100dp"
+        android:layout_marginTop="100dp"
+        android:text="点击按钮保存"
+    />
+
+    <Button
+        android:id="@+id/bt2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginLeft="50dp"
+        android:layout_marginTop="100dp"
+        android:text="点击按钮查看" />
+
+    </LinearLayout>
+
+</LinearLayout>