由网友(称霸全服)分享简介:谁能告诉如何绘制在Android的一条线,或许还有一个例子?Can anybody tell how to draw a line in Android, perhaps with an example?推荐答案这一个平局2线形成在屏幕的左上角十字:this one draws 2 lines which f...
谁能告诉如何绘制在Android的一条线,或许还有一个例子?
Can anybody tell how to draw a line in Android, perhaps with an example?
推荐答案
这一个平局2线形成在屏幕的左上角十字:
this one draws 2 lines which form a cross on the top left of the screen:
DrawView.java
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);
paint.setColor(Color.BLACK);
}
@Override
public void onDraw(Canvas canvas) {
canvas.drawLine(0, 0, 20, 20, paint);
canvas.drawLine(20, 0, 0, 20, paint);
}
}
该活动启动:
The activity to start it:
StartDraw.java
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
public class StartDraw extends Activity {
DrawView drawView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
drawView = new DrawView(this);
drawView.setBackgroundColor(Color.WHITE);
setContentView(drawView);
}
}
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