android简易画图工具

package com.android.mPaint; import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.graphics.Bitmap; import android.graphics.BlurMaskFilter; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.EmbossMaskFilter; import android.graphics.MaskFilter; import android.graphics.Paint; import android.graphics.Path; import android.graphics.PorterDuff; import android.graphics.PorterDuffXfermode; import android.graphics.RectF; import android.os.Bundle; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.MotionEvent; import android.view.View; public class mPaint extends Activity { /** Called when the activity is first created. */ private float mX,mY; private float startX,startY; private Paint mPaint,mBitmapPaint; private Canvas mCanvas; private Bitmap mBitmap; Bitmap bitmap=null; private Path mPath; private MaskFilter mEmboss; private MaskFilter mBlur; private static final String[] color=new String[]{"红色","蓝色","绿色"}; private static final String[] shape=new String[]{"浮现的","模糊的","正常的"}; private static final String[] graph=new String[]{"点","线","圆形","椭圆","矩形"}; private game mGameView; int choice=2; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mGameView = new game(this); setContentView(mGameView); mPaint = new Paint(); mPaint.setAntiAlias(true); mPaint.setDither(true); mPaint.setColor(Color.BLACK); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeJoin(Paint.Join.BEVEL); mPaint.setStrokeCap(Paint.Cap.SQUARE); mPaint.setStrokeWidth(12); } public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.menu, menu); return true; } public boolean onOptionsItemSelected(MenuItem item) { mPaint.setXfermode(null); int item_id = item.getItemId(); switch (item_id) { case R.id.color: AlertDialog dlg = new AlertDialog.Builder(mPaint.this) .setTitle("颜色选择") .setSingleChoiceItems(color, 0, new DialogInterface.OnClickListener() //设置事件监听 { public void onClick(DialogInterface dialog, int whichButton) { if(whichButton==0){ mPaint.setColor(Color.RED); dialog.dismiss(); } if(whichButton==1){ mPaint.setColor(Color.BLUE); dialog.dismiss(); } if(whichButton==2){ mPaint.setColor(Color.GREEN); dialog.dismiss(); } } }) .create();//创建 dlg.show();//显示 return true; case R.id.shape: AlertDialog dlg1 = new AlertDialog.Builder(mPaint.this) .setTitle("画笔样式选择") .setSingleChoiceItems(shape, 0, new DialogInterface.OnClickListener() //设置事件监听 { public void onClick(DialogInterface dialog, int whichButton) { if(whichButton==0){ if (mPaint.getMaskFilter() != mEmboss) { mPaint.setMaskFilter(mEmboss); } else { mPaint.setMaskFilter(null); } dialog.dismiss(); } if(whichButton==1){ if (mPaint.getMaskFilter() != mBlur) { mPaint.setMaskFilter(mBlur); } else { mPaint.setMaskFilter(null); } dialog.dismiss(); } if(whichButton==2){ mPaint.setMaskFilter(null); dialog.dismiss(); } } }) .create();//创建 dlg1.show();//显示 return true; case R.id.graph: AlertDialog dlg2 = new AlertDialog.Builder(mPaint.this) .setTitle("选择需要使用的几何图形") .setSingleChoiceItems(graph, 0, new DialogInterface.OnClickListener() //设置事件监听 { public void onClick(DialogInterface dialog, int whichButton) { if(whichButton==0){ choice=1; dialog.dismiss(); } if(whichButton==1){ choice=2; dialog.dismiss(); } if(whichButton==2){ choice=3; dialog.dismiss(); } if(whichButton==3){ choice=4; dialog.dismiss(); } if(whichButton==4){ choice=5; dialog.dismiss(); } } }) .create();//创建 dlg2.show();//显示 return true; case R.id.clean: mCanvas.drawColor(0xFFAAAAAA); return true; case R.id.rubber: choice=2; mPaint.setXfermode(new PorterDuffXfermode( PorterDuff.Mode.CLEAR)); return true; } return super.onOptionsItemSelected(item); } public class game extends View implements Runnable{ public game(Context context) { super(context); mPath = new Path(); mEmboss = new EmbossMaskFilter(new float[] { 1, 1, 1 }, 0.4f, 6, 3.5f); mBlur = new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL); mBitmap = Bitmap.createBitmap(320, 480, Bitmap.Config.ARGB_8888); mCanvas = new Canvas(mBitmap); mBitmapPaint = new Paint(Paint.DITHER_FLAG); } public void onDraw(Canvas canvas) { canvas.drawColor(0xFFAAAAAA); canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint); canvas.drawPath(mPath, mPaint); } private void touch_start(float x, float y) { mPath.reset(); mPath.moveTo(x, y); startX = x; startY = y; } private void touch_move(float x, float y) { switch(choice){ case 2: float dx = Math.abs(x - startX); float dy = Math.abs(y - startY); if (dx >= 4 || dy >= 4) { mPath.quadTo(startX, startY, (x + startX)/2, (y + startY)/2); startX = x; startY = y; } break; case 1: case 3: case 4: case 5: mX=x; mY=y; break; } } private void touch_up(float x, float y) { mX=x; mY=y; RectF mRectF=new RectF(startX,sta