Android银弧刀之ProgressBar之最炫民族风

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Android银弧刀之ProgressBar之最炫民族风_第1张图片

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

Android银弧刀之ProgressBar之最炫民族风_第2张图片

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
  Android银弧刀之ProgressBar之最炫民族风_第3张图片

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