源码地址:https://github.com/ldy1993/ToolforAS.git
简单做一下例子,了解一下,真正使用还是得百度一下好看的自定义进度条。
实际效果:
代码如下
public class Day8_Activity extends Activity {
private ProgressBar pb;
int i = 0;
private final int progressBar=0;
// volatile是一个类型修饰符(type specifier),被设计用来修饰被不同线程访问和修改的变量
public volatile boolean exit = false;
private Thread thread;
private Handler handler=new Handler(){
public void handleMessage(Message msg) {
switch (msg.what)
{
case progressBar:
pb.setProgress(msg.arg1);
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_day8);
pb=findViewById(R.id.pb);
thread = new Thread(new Runnable() {
@Override
public void run() {
while (!exit) {
try {
thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
Message message = new Message();
if (i <= 100) {
i++;
} else {
i = 0;
}
message.what = progressBar;
message.arg1 = i;
handler.sendMessage(message);
}
}
});
thread.start();
// setProgress(int) 设置第一进度
// setSecondaryProgress(int) 设置第二进度
}
public void begin(View view)
{
startThread();
}
public void stop(View view)
{
exit=true;
}
private void startThread()
{
if(exit==true) {
exit = false;
thread = new Thread(new Runnable() {
@Override
public void run() {
while (!exit) {
try {
thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
Message message = new Message();
if (i <= 100) {
i++;
} else {
i = 0;
}
message.what = progressBar;
message.arg1 = i;
handler.sendMessage(message);
}
}
});
thread.start();
}
}
}
<?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"
android:background="#ffffff">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="旋转进度条,用于加载动画"
/>
<ProgressBar
style="@android:style/Widget.ProgressBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="水平进度条"/>
<ProgressBar
android:id="@+id/pb"
style="@android:style/Widget.ProgressBar.Horizontal"
android:max="100"
android:progress="50"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="水平另外一个样式的进度条"/>
<ProgressBar
style="?android:attr/progressBarStyleHorizontal"
android:max="100"
android:progress="50"
android:secondaryProgress="80"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="begin"
android:background="#0044ff"
android:text="开始"
android:layout_marginRight="10dp"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#ee0000"
android:onClick="stop"
android:text="暂停" />
</LinearLayout>
</LinearLayout>
下一节:
安卓学习回顾与整理_(3.7、对话框Dialog)_day9