Android(2)
1.Android资源文件
构建应用程序需要丰富多彩的色彩，在Android平台中可以将相关颜色信息配置在color.xml文件中。
例：
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="green">#00EE00</color>
<color name="black">#000000</color>
<color name="red">#FF0000</color>
<color name="blue">#0000FF</color>
<color name="white">#FFFFFF</color>
</resources>
字符串常量文件
为了更好的国际化和本地化，Android平台建议将相关字符串常量放置在res/string.xml中。
例：
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">多彩手电筒</string>
<string name="action_settings">Settings</string>
<string name="hello_world">Hello world!</string>
</resources>
activity_main.xml：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/relayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:background="@color/black"
tools:context=".MainActivity" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="30dp"
android:layout_marginTop="41dp"
android:background="@color/white"
android:text="红色" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button1"
android:layout_below="@+id/button1"
android:layout_marginTop="37dp"
android:background="@color/white"
android:text="绿色" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button2"
android:layout_below="@+id/button2"
android:layout_marginTop="44dp"
android:background="@color/white"
android:text="蓝色" />
</RelativeLayout>
MainActivity.java
package com.example.bulb;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.Toast;
public class MainActivity extends Activity {
private Button btn1, btn2, btn3;
private RelativeLayout relayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn1 = (Button) this.findViewById(R.id.button1);
btn2 = (Button) this.findViewById(R.id.button2);
btn3 = (Button) this.findViewById(R.id.button3);
relayout = (RelativeLayout) this.findViewById(R.id.relayout);
btn1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// Toast.makeText(MainActivity.this, "11111111111",
// 10000).show();
relayout.setBackgroundColor(getResources()
.getColor(R.color.red));
}
});
btn2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
relayout.setBackgroundColor(getResources().getColor(
R.color.green));
}
});
btn3.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
relayout.setBackgroundColor(getResources().getColor(
R.color.blue));
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}运行结果为：
2.RadioButton单选按钮
<RadioGroup
android:id="@+id/radioGroup1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/sing"
android:layout_below="@+id/dancer"
android:layout_marginRight="30dp"
android:layout_marginTop="19dp"
android:orientation="horizontal" >
<RadioButton
android:id="@+id/radio0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="男" />
<RadioButton
android:id="@+id/radio1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="女" />
</RadioGroup>
strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">测试程序</string>
<string name="hello_world">Hello world!</string>
<string name="menu_settings">Settings</string>
<string name="btnok">确定</string>
<string name="btncancel">取消</string>
<string name="poems"><i>菩提本无树，明镜亦非台。</i>\n<u>本来无一物，何处惹尘埃</u></string>
</resources>
color.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="green">#00EE00</color>
<color name="red">#FF0000</color>
</resources>
array.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="provices">
<item >河北</item>
<item>上海</item>
<item>北京</item>
</string-array>
</resources>
activity_main.xml
<RelativeLayout
android:id="@+id/relayout"
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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:background="@color/red"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="148dp"
android:text="@string/hello_world" />
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="26dp"
android:layout_marginRight="40dp"
android:text="@string/btnok"
/>
<RatingBar
android:id="@+id/ratingBar1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView"
android:layout_below="@+id/textView"
android:layout_marginTop="64dp"
android:numStars="6"
android:rating="5"
android:scaleX="0.5"
android:stepSize="1" />
</RelativeLayout>
MainActivity.java
package com.csdn.he;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.res.Resources;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.RatingBar;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener {
private Button btn;
private TextView text;
private RatingBar bar;
private RelativeLayout relayout;
private float count;
private ImageView iv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn = (Button) this.findViewById(R.id.btn);
text = (TextView) this.findViewById(R.id.textView);
bar = (RatingBar) this.findViewById(R.id.ratingBar1);
relayout=(RelativeLayout) this.findViewById(R.id.relayout);
count = 4;
text.setText("你好！");
btn.setOnClickListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@SuppressLint("ResourceAsColor") @Override
public void onClick(View v) {
// TODO Auto-generated method stub
// TODO Auto-generated method stub
text.setText("点击按钮！");
bar.setRating(count);
count--;
// 设置文本框内容为当期日期
Date date = new Date();
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
text.setText(format.format(date).toString());
//修改颜色
relayout.setBackgroundColor(getResources().getColor(R.color.green));
text.setText(R.string.poems);
String[] privinces = getResources().getStringArray(R.array.provices);
for(int i=0;i<privinces.length; i++)
{
Toast.makeText(MainActivity.this, privinces[i], 10000).show();
}
}
}
