自由手記

package test8.android;

import android.app.Activity;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.graphics.RectF;

import android.os.Bundle;

import android.view.View;

public class Test8 extends Activity {

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView( new View(null){

private int i = 0; // 弧形角度

private int j = 0; //定義j以讓座標位置變動

Paint vPaint = new Paint();
// 繪製樣式物件

Paint mPaint = new Paint();
// 繪製樣式物件

Paint nPaint = new Paint();
// 繪製樣式物件

protected void onDraw(Canvas canvas) {

// TODO Auto-generated methodstub

super.onDraw(canvas);

// 設定繪圖樣式

mPaint.setColor( 0xff00ffff );// 畫筆顏色

mPaint.setAntiAlias( true);
// 反鋸齒

mPaint.setStyle(Paint.Style.FILL );

vPaint.setColor( 0xff00ffff );// 畫筆顏色

vPaint.setAntiAlias( true);
// 反鋸齒

vPaint.setStyle(Paint.Style.FILL );

nPaint.setColor( 0xff0000ff );// 画笔颜色

nPaint.setAntiAlias( true);
// 反钜齒

nPaint.setStyle(Paint.Style.FILL );

vPaint.setColor(0xff00ffff);

/* 写字，可以设定在屏幕上任何位置以绘图方式 显示文字 */

vPaint.setTextSize(25);

canvas.drawText("新者加油
",0,100,vPaint);

//绘制一个弧形

{

canvas.drawArc(new RectF(160-j,130, 240-j, 260), 200, 200+i, true, mPaint );

canvas.drawArc(new RectF(190-j,150, 200-j, 170), 0,
360,
true, nPaint );

i=i+5;//5這個常數是弧度變化幅度

j=j+5;//5這個常數是位置座標變化幅度

if (i>100)

i=0;

if (220-j<10)

j=0;

}

// 重繪, 再一次執行 onDraw 程序

invalidate();

}

});

}

}

这个模拟画面是一个动画，小精灵几左边移动