android图像相关

首先是Bitmap：

从资源文件中得到bitmap有两种方式：

一：

Resources r = getResources(); InputStream is = r.openRawResource(R.drawable.icon); BitmapDrawable bmpDraw = new BitmapDrawable(is); Bitmap bmp1 = bmpDraw.getBitmap();二：

BitmapDrawable drawable = (BitmapDrawable)r.getDrawable(R.drawable.icon)

一下是画各种图形，首先写了一个画图形的接口：

package com.song.ui; import android.graphics.Canvas; public interface drawGraphics { public void draw(Canvas canvas); }
然后花各种图形的时候实现接口：

画线：

package com.song.ui; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; /** * 画线 * @author song * */ public class DrawLine implements drawGraphics { //声明一个画笔 private Paint mPaint; public DrawLine() { mPaint = new Paint(); } @Override public void draw(Canvas canvas) { //消除锯齿 mPaint.setAntiAlias(true); //直线 颜色：绿色 mPaint.setColor(Color.GREEN); //设置线条粗细 mPaint.setStrokeWidth(12); //画两条直线 canvas.drawLine(90, 40, 140, 90, mPaint); canvas.drawLine(290, 90, 340, 40, mPaint); } }
画圆：

package com.song.ui; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.RectF; /** * 画圆 * @author song * */ public class DrawCircle implements drawGraphics { private Paint paint ; private Paint paint_eye; public DrawCircle() { paint= new Paint(); paint_eye=new Paint(); } @Override public void draw(Canvas canvas) { //绘制圆形（圆心X，圆心Y，半径R，画笔P） paint_eye.setAntiAlias(true); paint.setAntiAlias(true); RectF rectF= new RectF(90, 60, 340, 240); paint_eye.setColor(Color.WHITE); paint.setColor(Color.GREEN); canvas.drawArc(rectF, 180, 180, true, paint); //画两个眼睛 canvas.drawCircle(160, 110, 18, paint_eye); canvas.drawCircle(270, 110, 18, paint_eye); } }
画矩形：

package com.song.ui; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.RectF; /** * 画矩形 * * @author song * */ public class DrawRect implements drawGraphics { private Paint paint; public DrawRect() { paint = new Paint(); } @Override public void draw(Canvas canvas) { // 定义圆角矩形对象 RectF rectF1 = new RectF(90, 170, 340, 500); RectF rectF2 = new RectF(10, 150, 60, 400); RectF rectF3 = new RectF(360, 150, 410, 400); RectF rectF4 = new RectF(110, 520, 170, 650); RectF rectF5 = new RectF(260, 520, 320, 650); paint.setAntiAlias(true); // 设置画笔颜色为BLUE paint.setColor(Color.GREEN); // 在画布上绘制圆角矩形/圆弧/直线 canvas.drawRoundRect(rectF1, 20, 20, paint); canvas.drawRoundRect(rectF2, 20, 20, paint); canvas.drawRoundRect(rectF3, 20, 20, paint); canvas.drawRoundRect(rectF4, 20, 20, paint); canvas.drawRoundRect(rectF5, 20, 20, paint); } }
这个可以画出来一个Android的机器人，

工程名：TL03_graphics_test