在main.xml中:
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> android:layout_width="fill_parent" android:layout_height="wrap_content"/>
在MyPaintDemo.java中:
package com.li.paintproject;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v4.app.NavUtils;
public class MyPaintDemo extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
在MyView.java中:
package com.li.paintproject;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
public class MyView extends View {
public MyView(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawColor(Color.BLACK) ; // 画布为黑色
Paint paint = new Paint() ;
paint.setColor(Color.YELLOW) ; // 设置图形的颜色
canvas.drawRect(120,50,360,200, paint) ; //矩形左上角坐标(160,50),右下角坐标(360,200)
}
}