Android(2)

来源：互联网发布：支付宝没开网络被盗刷? 编辑：程序博客网时间：2024/06/05 19:32

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"?>

<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"?>

<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; @Overrideprotected 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() { @Overridepublic void onClick(View arg0) {// Toast.makeText(MainActivity.this, "11111111111",// 10000).show(); relayout.setBackgroundColor(getResources().getColor(R.color.red));}}); btn2.setOnClickListener(new OnClickListener() { @Overridepublic void onClick(View arg0) {relayout.setBackgroundColor(getResources().getColor(R.color.green)); }}); btn3.setOnClickListener(new OnClickListener() { @Overridepublic void onClick(View arg0) {relayout.setBackgroundColor(getResources().getColor(R.color.blue));}}); } @Overridepublic 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>

3.小案例：

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;@Overrideprotected 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);}@Overridepublic 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") @Overridepublic void onClick(View v) {// TODO Auto-generated method stub// TODO Auto-generated method stubtext.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();}}}

0 0