[英]timertask doesn't work!
我已經嘗試使用timertask刷新以固定點坐標繪制的線(每1秒之后)。 但是該行似乎沒有刷新...我的代碼有什么問題嗎?
LineRefresh.java:
package LineRefresh.xyz.com;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
public class LineRefresh extends Activity {
DrawView drawView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
drawView = new DrawView(this);
drawView.setBackgroundColor(Color.WHITE);
setContentView(drawView);
}
}
DrawView.java:
package LineRefresh.xyz.com;
import java.util.Timer;
import java.util.TimerTask;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;
public class DrawView extends View {
Paint paint = new Paint();
public DrawView(Context context) {
super(context);
}
@Override
public void onDraw(final Canvas canvas) {
paint.setColor(Color.BLACK);
canvas.drawLine(50, 200, 270, 200, paint);
Timer timer = new Timer();
TimerTask task = new TimerTask() {
@Override
public void run() {
paint.setColor(Color.BLACK);
canvas.drawLine(50, 200, 270, 200, paint);
}
};
timer.schedule(task, 1000,1000);
}
}
我應該在我的代碼中將timertask放在其他位置嗎?
而是在一定時間后使用Android處理程序更新UI。
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