Android银弧刀之ProgressBar之最炫民族风

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银弧刀 
        陆无双抬起头来,只见四名乞丐,一字排在门外,或高或矮,一齐望着自己。她曾用银弧刀伤了一个乞丐,一见这四人来意不善,心中暗暗吃惊。。。杨过听了她声音,也是大吃一惊,只听另一个女人声音道:“那叫化子背上的,明明是师妹的银弧刀,就可惜没能起下来认一下。”

        今天我们学习如何利用Android平台“银弧刀”ProgressBar来实现各种样式的进度条,白的黄的都有^_^。实际生活中进度条常常用来提示用户后台正在执行比较耗时的操作,请等待一会儿。当操作执行完毕时,它就随风逝去了。下面给出该情景的案例:

一、案例技术要点

1.ProgressBar布局设置
style="?android:attr/progressBarStyleSmallTitle":小圆形进度条
style="?android:attr/progressBarStyleLarge":大圆形进度条
style="?android:attr/progressBarStyleHorizontal":水平进度条
2.设置有刻度效果的窗口
requestWindowFeature(Window.FEATURE_PROGRESS):设置窗口有进度条
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS):设置窗口有模糊进度条
setProgressBarVisibility(true):设置进度条显示
setProgressBarIndeterminate(true):设置模糊进度条显示
3.android.widget.ProgressBar:Android进度条类
progressBar.setProgress(...):设置进度条刻度值
progressBar.getProgress():获取进度条刻度值

二、案例代码陈列

工程包目录


AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.android.progressbar"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="15" />    <application        android:icon="@drawable/ic_launcher"        android:label="@string/app_name" >        <activity            android:name=".ProgressBarMainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>
strings.xml
<resources>    <string name="app_name">ProgressBar大世界</string></resources>
main.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="小圆形进度条" />    <ProgressBar        style="?android:attr/progressBarStyleSmallTitle"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="中圆形进度条" />    <ProgressBar        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="大圆形进度条" />    <ProgressBar        style="?android:attr/progressBarStyleLarge"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="水平进度条" />    <ProgressBar        style="?android:attr/progressBarStyleHorizontal"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:max="100"        android:progress="30" />    <ProgressBar        android:id="@+id/progressBar"        style="?android:attr/progressBarStyleHorizontal"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginTop="20dp"        android:max="100"        android:progress="30"        android:secondaryProgress="60" />    <LinearLayout        xmlns:android="http://schemas.android.com/apk/res/android"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:orientation="horizontal" >        <Button            android:id="@+id/button1"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="增加刻度" />        <Button            android:id="@+id/button2"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="减小刻度" />    </LinearLayout></LinearLayout>
ProgressBarMainActivity.java
package com.android.progressbar;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.widget.Button;import android.widget.ProgressBar;/** * ProgressBar案例:各种样式的进度条 * 向用户展示当前任务的进度 * @author lynnli1229 */public class ProgressBarMainActivity extends Activity implements OnClickListener{    private ProgressBar progressBar;    private Button button1, button2;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);                // 设置有刻度效果的窗口        requestWindowFeature(Window.FEATURE_PROGRESS);        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);                setContentView(R.layout.main);        progressBar = (ProgressBar) findViewById(R.id.progressBar);        setProgressBarVisibility(true);        setProgressBarIndeterminate(true);        setProgress(3500);                button1 = (Button) findViewById(R.id.button1);        button2 = (Button) findViewById(R.id.button2);        button1.setOnClickListener(this);        button2.setOnClickListener(this);    }    @Override    public void onClick(View v) {        switch (v.getId()) {        case R.id.button1:            progressBar.setProgress((int) (progressBar.getProgress() * 1.2));            progressBar.setSecondaryProgress((int) (progressBar.getSecondaryProgress() * 1.2));            break;        case R.id.button2:            progressBar.setProgress((int) (progressBar.getProgress() * 0.8));            progressBar.setSecondaryProgress((int) (progressBar.getSecondaryProgress() * 0.8));            break;        }    }}
三、案例效果展示