Android中ProgressBar的使用

ProgressBar滚动体在安卓程序中使用也计较多。

ProgressBar的几个常用属性和方法

android:max=”200” 滚动条最大值
android:progress=”0” 滚动条当前值
android:visibility=”visible” 滚动条是否可见

setProgress(int) 设置当前值

[html] view plain copy print ?

<RelativeLayout 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”
tools:context=“.MainActivity” >
<TextView
android:id=“@+id/text”
android:layout_width=“wrap_content”
android:layout_height=“wrap_content”
android:text=“@string/text”
android:textSize=“25sp” />
<EditText
android:id=“@+id/value”
android:layout_width=“wrap_content”
android:layout_height=“wrap_content”
android:text=“2”
android:layout_toRightOf=“@id/text”
android:textSize=“15sp” />
sytle滚动条样式：progressBarStyleHorizontal一个长条形
max 滚动条最大值
progress 滚动条当前值
visibility 是否可见
–>
<ProgressBar
android:id=“@+id/firstBar”
style=“?android:attr/progressBarStyleHorizontal”
android:layout_width=“200dp”
android:layout_height=“wrap_content”
android:layout_alignLeft=“@+id/text”
android:layout_below=“@+id/text”
android:max=“200”
android:maxHeight=“48dp”
android:minHeight=“48dp”
android:progress=“0”
android:visibility=“visible” />
<TextView
android:id=“@+id/text2”
android:layout_below=“@id/firstBar”
android:layout_width=“wrap_content”
android:layout_height=“wrap_content”
android:text=“@string/text”
android:textSize=“25sp” />
<EditText
android:id=“@+id/value2”
android:layout_below=“@id/firstBar”
android:layout_width=“wrap_content”
android:layout_height=“wrap_content”
android:text=“2”
android:layout_toRightOf=“@id/text”
android:textSize=“15sp” />
sytle滚动条样式：progressBarStyleLarge一个大圆形样式
–>
<ProgressBar
android:id=“@+id/firstBar2”
style=“?android:attr/progressBarStyleLarge”
android:layout_width=“200dp”
android:layout_height=“wrap_content”
android:layout_alignLeft=“@+id/text2”
android:layout_below=“@+id/text2”
android:max=“200”
android:progress=“0”
android:visibility=“visible” />
–>
<ProgressBar
android:id=“@+id/firstBar3”
style=“?android:attr/progressBarStyleSmallTitle”
android:layout_width=“200dp”
android:layout_height=“wrap_content”/>
RelativeLayout>

MainActivity：

处理动态加载滚动条

[java] view plain copy print ?

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//请求设置窗口标题栏滚动条
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.activity_main);
pb = (ProgressBar)findViewById(R.id.firstBar);
value = (EditText)findViewById(R.id.value);
//设置滚动条可见
setProgressBarIndeterminateVisibility(true);
//创建一个Handler
mHandler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
//处理消息
switch (msg.what) {
case MSG:
//设置滚动条和text的值
pb.setProgress(pro);
value.setText(Integer.toString(pro));
break;
default:
break;
}
}
};
start();
}
private void start()
{
new Thread(new Runnable() {
@Override
public void run() {
int max = pb.getMax();
try {
//子线程循环间隔消息
while (pro < max) {
pro += 10;
Message msg = new Message();
msg.what = MSG;
mHandler.sendMessage(msg);
Thread.sleep(1000);
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
}

protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        //请求设置窗口标题栏滚动条        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);        setContentView(R.layout.activity_main);        pb = (ProgressBar)findViewById(R.id.firstBar);        value = (EditText)findViewById(R.id.value);        //设置滚动条可见        setProgressBarIndeterminateVisibility(true);        //创建一个Handler        mHandler = new Handler(){            @Override            public void handleMessage(Message msg) {                super.handleMessage(msg);                //处理消息                switch (msg.what) {                    case MSG:                        //设置滚动条和text的值                        pb.setProgress(pro);                        value.setText(Integer.toString(pro));                        break;                    default:                        break;                }            }        };        start();    }    private void start()    {        new Thread(new Runnable() {            @Override            public void run() {                int max = pb.getMax();                try {                    //子线程循环间隔消息                    while (pro < max) {                        pro += 10;                        Message msg = new Message();                        msg.what = MSG;                        mHandler.sendMessage(msg);                        Thread.sleep(1000);                    }                } catch (InterruptedException e) {                    e.printStackTrace();                }            }        }).start();    }

效果图：

Android中ProgressBar的使用_第1张图片

转自sujudz的博客：http://blog.csdn.net/sujudz/article/details/9018861

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