I just built an Open GL apps for demonstrating the use of graphics display on Android. My device is HTC Desire. Both screenshot and code snippet are attached here. I'm going to post further dev. code snippets and reviews afterwards. Enjoy!
package com.example.cubeOpenGL;
import android.app.Activity;
import android.os.Bundle;
//package com.example.android.apis.graphics;
import android.content.Context;
import android.graphics.*;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.*;
import android.view.*;
public class androidCubeActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new SampleView(this));
}
private static class SampleView extends View {
private ShapeDrawable[] mDrawables;
private static Shader makeSweep() {
return new SweepGradient(150, 25,
new int[] { 0xFFFF0000, 0xFF00FF00, 0xFF0000FF, 0xFFFF0000 },
null);
}
private static Shader makeLinear() {
return new LinearGradient(0, 0, 50, 50,
new int[] { 0xFFFF0000, 0xFF00FF00, 0xFF0000FF },
null, Shader.TileMode.MIRROR);
}
private static Shader makeTiling() {
int[] pixels = new int[] { 0xFFFF0000, 0xFF00FF00, 0xFF0000FF, 0};
Bitmap bm = Bitmap.createBitmap(pixels, 2, 2,
Bitmap.Config.ARGB_8888);
return new BitmapShader(bm, Shader.TileMode.REPEAT,
Shader.TileMode.REPEAT);
}
private static class MyShapeDrawable extends ShapeDrawable {
private Paint mStrokePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
public MyShapeDrawable(Shape s) {
super(s);
mStrokePaint.setStyle(Paint.Style.STROKE);
}
public Paint getStrokePaint() {
return mStrokePaint;
}
@Override protected void onDraw(Shape s, Canvas c, Paint p) {
s.draw(c, p);
s.draw(c, mStrokePaint);
}
}
public SampleView(Context context) {
super(context);
setFocusable(true);
float[] outerR = new float[] { 12, 12, 12, 12, 0, 0, 0, 0 };
RectF inset = new RectF(6, 6, 6, 6);
float[] innerR = new float[] { 12, 12, 0, 0, 12, 12, 0, 0 };
Path path = new Path();
path.moveTo(50, 0);
path.lineTo(0, 50);
path.lineTo(50, 100);
path.lineTo(100, 50);
path.close();
mDrawables = new ShapeDrawable[7];
mDrawables[0] = new ShapeDrawable(new RectShape());
mDrawables[1] = new ShapeDrawable(new OvalShape());
mDrawables[2] = new ShapeDrawable(new RoundRectShape(outerR, null,
null));
mDrawables[3] = new ShapeDrawable(new RoundRectShape(outerR, inset,
null));
mDrawables[4] = new ShapeDrawable(new RoundRectShape(outerR, inset,
innerR));
mDrawables[5] = new ShapeDrawable(new PathShape(path, 100, 100));
mDrawables[6] = new MyShapeDrawable(new ArcShape(45, -270));
mDrawables[0].getPaint().setColor(0xFFFF0000);
mDrawables[1].getPaint().setColor(0xFF00FF00);
mDrawables[2].getPaint().setColor(0xFF0000FF);
mDrawables[3].getPaint().setShader(makeSweep());
mDrawables[4].getPaint().setShader(makeLinear());
mDrawables[5].getPaint().setShader(makeTiling());
mDrawables[6].getPaint().setColor(0x88FF8844);
PathEffect pe = new DiscretePathEffect(10, 4);
PathEffect pe2 = new CornerPathEffect(4);
mDrawables[3].getPaint().setPathEffect(
new ComposePathEffect(pe2, pe));
MyShapeDrawable msd = (MyShapeDrawable)mDrawables[6];
msd.getStrokePaint().setStrokeWidth(4);
}
@Override protected void onDraw(Canvas canvas) {
int x = 10;
int y = 10;
int width = 300;
int height = 50;
for (Drawable dr : mDrawables) {
dr.setBounds(x, y, x + width, y + height);
dr.draw(canvas);
y += height + 5;
}
}
}
}
