[英]Inserting data to database is freezing my app
I have got class with timer. 我上课了。 This class is adding new items for my Array of points. 这个类正在为我的Array点添加新项。 That points are moving and from a body of timer im repainting a panel to draw them in new positions. 这些点正在移动,并从计时器的主体重新绘制一个面板以在新的位置绘制它们。 Im connected to database sqlite. 我连接到数据库sqlite。 when im calling an insert function to add point to the table - apps freeze for 1s. 当我调用一个插入函数来添加点到表 - 应用程序冻结1秒。
I want to ask is there any way to not stoping drawing/repainting? 我想问有没有办法不停止绘画/重新绘画? i want that operation of inserting will be doing in background. 我希望插入操作将在后台进行。
any ideas? 有任何想法吗?
Ps: i heard about swing worker but idk is it suitable to my sitaution Ps:我听说过摇摆工作者但是idk适合我的情况
EDIT: 编辑:
class Generator{
ChangeListener listener;
ArrayList<String> s;
JPanel p;
Timer generatorTimer;
MyDatabase b;
public Generator(){
this.s = new ArrayList<String>();
this.b = new MyDatabase();
generatorTimer = new Timer(40, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
addItem();
p.repaint();
}
});
generatorTimer.start();
}
private void addItem(){
String newString = new String("sampleText");
s.add(newString);
b.insert(newString); //inserting new item do database
listener.stateChanged(new ChangeEvent(this));
}
public void setPanel(JPanel p){
this.p = p;
}
public ArrayList<String> getArray(){
return s;
}
public void addListener(ChangeListener list){
this.listener = list;
}
}
Can u give me example how to replace my Timer
with a SwingWorker
? 你能举例说明如何用SwingWorker
替换我的Timer
吗?
Change your addItem method to something like this: 将addItem方法更改为以下内容:
private void addItem() {
final String newString = new String("sampleText");
s.add(newString);
Runnable runnable = new Runnable() {
@Override
public void run() {
// inserting new item to database
b.insert(newString);
}
};
new Thread(runnable).start();
listener.stateChanged(new ChangeEvent(this));
}
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