hzuapps#5 hzuapps#934 实验5

Soft1614080902237/app/src/main/java/com/example/john/soft1614080902237/M3Activity.java

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+package com.example.john.soft1614080902237;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.KeyEvent;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.Toast;
+
+public class M3Activity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_m3);
+        final EditText editText=(EditText)findViewById(R.id.edit_text);
+        //获取控件
+        Button btnLogin=(Button)findViewById(R.id.chaxun);
+        Button buttonque=(Button)findViewById(R.id.queding);
+        //final EditText EdPassword=(EditText) findViewById(R.id.edit_text);
+        final EditText EdUserName=(EditText)findViewById(R.id.edit_text);
+
+        btnLogin.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                SharedPreferences sharedPreferences = getSharedPreferences("jc", Context.MODE_PRIVATE);//创建SharedPreferences对象
+                SharedPreferences.Editor editor = sharedPreferences.edit(); //需要获取SharedPreferences的编辑对象
+                editor.putString("username", editText.getText().toString()); //向preferences写入数据：
+                //editor.putString("Password", EdPassword.getText().toString());
+                editor.commit();// 向preferences文件中提交数据：
+                Intent intent=new Intent(M3Activity.this,M5Activity.class);
+                startActivity(intent);
+            }
+        } );
+        buttonque.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intent=new Intent(M3Activity.this,M6Activity.class);
+                startActivity(intent);
+            }
+        });
+    }
+}

Soft1614080902237/app/src/main/java/com/example/john/soft1614080902237/M5Activity.java

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+package com.example.john.soft1614080902237;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.widget.TextView;
+
+public class M5Activity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_m5);
+        TextView txtUserName=(TextView) findViewById(R.id.txt_UserName);
+       // TextView txtPassword=(TextView) findViewById(R.id.txt_Password);
+
+        SharedPreferences sharedPreferences = getSharedPreferences("jc", Context.MODE_PRIVATE); //创建SharedPreferences对象
+        String userName=sharedPreferences.getString("username","");//根据key获取对应的数据
+        //String password=sharedPreferences.getString("Password","");
+       // txtPassword.setText(password);//给TextView设置text的值
+        txtUserName.setText(userName);
+    }
+    }

Soft1614080902237/app/src/main/java/com/example/john/soft1614080902237/M6Activity.java

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+package com.example.john.soft1614080902237;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+
+public class M6Activity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_m6);
+    }
+}

Soft1614080902237/app/src/main/res/layout/activity_m3.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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".M3Activity">
+
+    <LinearLayout
+        android:id="@+id/linearLayout2"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:orientation="vertical"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+
+        <EditText
+            android:id="@+id/edit_text"
+            android:layout_width="fill_parent"
+            android:layout_height="wrap_content"
+            android:layout_margin="10sp"
+            android:hint="请输入搜索的书名..."
+            android:maxLength="40"
+            android:textColorHint="#238745" />
+
+        <Button
+            android:id="@+id/queding"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="确定" />
+
+        <Button
+            android:id="@+id/chaxun"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="end"
+            android:text="查询记录" />
+    </LinearLayout>
+
+</android.support.constraint.ConstraintLayout>

Soft1614080902237/app/src/main/res/layout/activity_m5.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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".M5Activity">
+    <RelativeLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content">
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="80sp"
+            android:layout_marginLeft="30sp"
+            android:text="搜索记录为："
+            android:textSize="40px"/>
+
+        <TextView
+            android:id="@+id/txt_UserName"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="80sp"
+            android:layout_marginLeft="150sp"
+            android:textSize="40px"/>
+
+    </RelativeLayout>
+
+
+</android.support.constraint.ConstraintLayout>

Soft1614080902237/app/src/main/res/layout/activity_m6.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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".M6Activity">
+
+</android.support.constraint.ConstraintLayout>