• java实验四


    Android Stuidio的安装测试

    • 参考http://www.cnblogs.com/rocedu/p/6371315.html#SECANDROID,安装 Android Stuidio
    • 完成Hello World, 要求修改res目录中的内容,Hello World后要显示自己的学号,自己学号前后一名同学的学号,提交代码运行截图和码云Git链接,截图没有学号要扣分
    • 学习Android Stuidio调试应用程序
      实验代码:
      activity_main.xml
    <?xml version="1.0" encoding="utf-8"?>
    
    <LinearLayout 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"
        android:layout_gravity="center"
        android:gravity="center_horizontal"
        android:padding="120dp"
        android:orientation="vertical"
        tools:context=".MainActivity">
    
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="right"
            android:layout_marginTop="16dp"
            android:paddingLeft="16dp"
            android:paddingRight="16dp"
            android:text="Hello World!20175218 20175219 20175220"
            android:id="@+id/btn1"  />
    
    </LinearLayout>
    

    运行结果

    Activity测试

    • 构建项目,运行教材相关代码
    • 创建 ThirdActivity, 在ThirdActivity中显示自己的学号,修改代码让MainActivity启动ThirdActivity
    • 提交代码运行截图和码云Git链接,截图要有学号水印,否则会扣分
      实验代码
      AndroidManiest.xml
    <?xml version="1.0" encoding="utf-8"?>
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
        package="com.example.myapplication">
    
        <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=".ThirdActivity"></activity>
            <activity android:name=".Main2Activity" />
            <activity android:name=".MainActivity">
                <intent-filter>
                    <action android:name="android.intent.action.MAIN" />
    
                    <category android:name="android.intent.category.LAUNCHER" />
                </intent-filter>
            </activity>
        </application>
    
    </manifest>
    

    mainactivity

    package com.example.myapplication;
    
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.app.Activity;
    import android.content.Intent;
    import android.view.Menu;
    import android.view.MotionEvent;
    import android.view.View;
    import android.view.View.OnTouchListener;
    import android.widget.TextView;
    import android.widget.Toast;
    public class MainActivity extends AppCompatActivity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            
        }
        public boolean onTouch(View arg0, MotionEvent event) {
            Intent intent = new Intent(this, ThirdActivity.class);
            intent.putExtra("message", "20175219");
            startActivity(intent);
            return true;
        }
    }
    

    运行结果

    UI测试

    • 构建项目,运行教材相关代码
    • 修改代码让Toast消息中显示自己的学号信息
    • 提交代码运行截图和码云Git链接,截图要有学号水印,否则会扣分
      实验代码
      activituy_main.xml
    <?xml version="1.0" encoding="utf-8"?>
    
    <LinearLayout 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"
        android:layout_gravity="center"
        android:gravity="center_horizontal"
        android:padding="120dp"
        android:orientation="vertical"
        tools:context=".MainActivity">
    
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="right"
            android:layout_marginTop="16dp"
            android:paddingLeft="16dp"
            android:paddingRight="16dp"
            android:text="Hello!"
            android:id="@+id/btn1"  />
    
    </LinearLayout>
    

    mainactivity

    package com.example.myapplication;
    
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.app.Activity;
    import android.content.Intent;
    import android.view.Menu;
    import android.view.MotionEvent;
    import android.view.View;
    import android.view.View.OnTouchListener;
    import android.widget.TextView;
    import android.widget.Toast;
    public class MainActivity extends AppCompatActivity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            Toast.makeText(MainActivity.this, "20175219!", Toast.LENGTH_SHORT).show();
        }
        public boolean onTouch(View arg0, MotionEvent event) {
            Intent intent = new Intent(this, ThirdActivity.class);
            intent.putExtra("message", "20175219");
            startActivity(intent);
            return true;
        }
        public void onClick(View v) {
            Toast toast = Toast.makeText(MainActivity.this, "20175219罗乐琦", Toast.LENGTH_LONG);
            toast.show();
        }
    }
    

    运行结果

    布局测试

    • 构建项目,运行教材相关代码
    • 修改布局让P290页的界面与教材不同
    • 提交代码运行截图和码云Git链接,截图要有学号水印,否则会扣分
      实验代码
      activity_main.xml
    <?xml version="1.0" encoding="utf-8"?>
    
    <LinearLayout 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"
        android:layout_gravity="center"
        android:gravity="center_horizontal"
        android:padding="40dp"
        android:paddingLeft="200dp"
        android:paddingRight="200dp"
        android:orientation="vertical"
        tools:context=".MainActivity">
    
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="right"
            android:layout_marginTop="23dp"
            android:text="Hello!"
            android:id="@+id/btn1"  />
        <Button
            android:id="@+id/saveButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="罗乐琦"
            android:layout_below="@+id/cancelButton"
            android:layout_alignLeft="@+id/cancelButton"
            android:layout_alignStart="@+id/cancelButton"
            android:layout_marginTop="23dp" />
    
        <ImageView
            android:layout_width="150dp"
            android:layout_height="150dp"
            android:layout_marginTop="45dp"
            android:padding="4dp"
            android:src="@android:drawable/ic_btn_speak_now"
            tools:srcCompat="@tools:sample/avatars[8]" />
        <LinearLayout
            android:id="@+id/filter_button_container"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:gravity="center|bottom"
            android:background="@android:color/white"
            android:orientation="horizontal" >
            <Button
                android:id="@+id/filterButton"
                android:layout_width="wrap_content"
                android:layout_height="fill_parent"
                android:text="Filter" />
            <Button
                android:id="@+id/shareButton"
                android:layout_width="wrap_content"
                android:layout_height="fill_parent"
                android:text="Share" />
            <Button
                android:id="@+id/deleteButton"
                android:layout_width="wrap_content"
                android:layout_height="fill_parent"
                android:text="Delete" />
            </LinearLayout>
    </LinearLayout>
    

    运行结果

    事件处理测试

    • 构建项目,运行教材相关代码
    • 提交代码运行截图和码云Git链接,截图要有学号水印,否则会扣分
      实验代码
      activity_main.xml
    <?xml version="1.0" encoding="utf-8"?>
    
    <LinearLayout 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"
        android:layout_gravity="center"
        android:gravity="center_horizontal"
        android:padding="90dp"
        android:orientation="vertical"
        tools:context=".MainActivity">
        <AnalogClock
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="90dp"
            android:id="@+id/analogClock1"
            android:onClick="changeColor" />
        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="20175219罗乐琦"
    
            android:layout_marginLeft="20dp"
            android:layout_marginTop="20dp"
            android:textSize="20dp"
            android:textColor="#bbbb00"/>
    
    
    </LinearLayout>
    

    mainactivity

    package com.example.myapplication;
    
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.app.Activity;
    import android.content.Intent;
    import android.view.Menu;
    import android.view.MotionEvent;
    import android.view.View;
    import android.view.View.OnTouchListener;
    import android.widget.TextView;
    import android.widget.Toast;
    import android.graphics.Color;
    import android.widget.AnalogClock;
    public class MainActivity extends Activity {
        int counter = 0;
        int[] colors = { Color.BLACK, Color.BLUE, Color.CYAN,
                Color.DKGRAY, Color.GRAY, Color.GREEN, Color.LTGRAY,
                Color.MAGENTA, Color.RED, Color.WHITE, Color.YELLOW };
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
        }
    
        public void changeColor(View view) {
            if (counter == colors.length) {
                counter = 0;
            }
            view.setBackgroundColor(colors[counter++]);
        }
    }
    

    实验结果

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  • 原文地址:https://www.cnblogs.com/luoleqi/p/10889116.html
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