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