import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.LinearGradient; import android.graphics.Paint; import android.graphics.Shader; import android.view.View;/*** @version 2012-8-14 上午10:45:28**/ public class myGameView extends View implements Runnable {int bitwidth = 0;int bitheight = 0;Paint mPaint = null;// 線性漸變渲染Shader mLinearGradient1 = null;// 線性漸變渲染Shader mLinearGradient2 = null;// 線性漸變渲染Shader mLinearGradient3 = null;public myGameView(Context context) {super(context);// 創(chuàng)建LinearGradient并設(shè)置漸變顏色數(shù)組// 第一個(gè),第二個(gè)參數(shù)表示漸變起點(diǎn) 能夠設(shè)置起點(diǎn)終點(diǎn)在對(duì)角等任何位置// 第三個(gè),第四個(gè)參數(shù)表示漸變終點(diǎn)// 第五個(gè)參數(shù)表示漸變顏色// 第六個(gè)參數(shù)能夠?yàn)榭?表示坐標(biāo),值為0-1 new float[] {0.25f, 0.5f, 0.75f, 1 }// 假設(shè)這是空的，顏色均勻分布，沿梯度線。// 第七個(gè)表示平鋪方式// CLAMP反復(fù)最后一個(gè)顏色至最后// MIRROR反復(fù)著色的圖像水平或垂直方向已鏡像方式填充會(huì)有翻轉(zhuǎn)效果// REPEAT反復(fù)著色的圖像水平或垂直方向mLinearGradient1 = new LinearGradient(0, 0, 0, 100, new int[] {Color.RED, Color.GREEN, Color.BLUE, Color.WHITE }, null,Shader.TileMode.CLAMP);mLinearGradient2 = new LinearGradient(0, 0, 0, 100, new int[] {Color.RED, Color.GREEN, Color.BLUE, Color.WHITE }, null,Shader.TileMode.MIRROR);mLinearGradient3 = new LinearGradient(0, 0, 0, 100, new int[] {Color.RED, Color.GREEN, Color.BLUE, Color.WHITE }, null,Shader.TileMode.REPEAT);mPaint = new Paint();new Thread(this).start();}@Overrideprotected void onDraw(Canvas canvas) {// LinearGradient的高度僅僅有100而繪制的矩形有200所以才會(huì)有反復(fù)// 假設(shè)高度兩者同樣clamp反復(fù)是看不出效果的Paint paint = new Paint();paint.setTextSize(20);paint.setColor(Color.WHITE);// 繪制漸變的矩形mPaint.setShader(mLinearGradient1);canvas.drawRect(0, 0, 200, 200, mPaint);canvas.drawText("CLAMP", 0, 200 + 20, paint);// 繪制漸變的矩形mPaint.setShader(mLinearGradient2);canvas.drawRect(0, 250, 200, 450, mPaint);canvas.drawText("MIRROR", 0, 450 + 20, paint);// 繪制漸變的矩形mPaint.setShader(mLinearGradient3);canvas.drawRect(0, 500, 200, 700, mPaint);canvas.drawText("REPEAT", 0, 700 + 20, paint);}@Overridepublic void run() {while(!Thread.currentThread().isInterrupted()) {try {Thread.sleep(100);}catch(Exception e) {Thread.currentThread().interrupt();}postInvalidate();}} }效果圖

轉(zhuǎn)載于:https://www.cnblogs.com/bhlsheji/p/4268017.html

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