Simple canvas for Android

<喎?http: www.bkjia.com kf ware vc " target="_blank" class="keylink"> VcD4KPHA + tq + 7 rcbkyrW + release + m8/snPu + release/release + yc + 75tbGtcTNvNDOt6LJ + release/vMfXodXi0KnK/release + vODM/release + /kernel + CjxwPs/kernel + jrMO/zPXWsc/kernel/Kwrz + kernel/VBhdGjA4L/kernel + kernel/kernel + ckernel vcd4kpha + kernel = "brush: java; "> import android. content. context; import android. graphics. bitmap; import android. graphics. bitmap. config; import android. graphics. canvas; import android. graphics. color; import android. graphics. paint; import android. graphics. path; import android. util. attributeSet; import android. view. motionEvent; import android. view. view; public class DrawView extends View {float preX; float preY; private Path path; public Paint paint = null; final int VIEW_WIDTH = 480; // you can adjust the final int VIEW_HEIGHT = 800 according to the resolution of your mobile phone; // define an image in memory, which will be used as the buffer zone Bitmap cacheBitmap = null; // define the Canvas object Canvas cacheCanvas on cacheBitmap = null; public DrawView (Context context, AttributeSet set) {super (context, set ); // create a cache with the same size as this View. cacheBitmap = Bitmap. createBitmap (VIEW_WIDTH, VIEW_HEIGHT, Config. ARGB_8888); cacheCanvas = new Canvas (); path = new Path (); // set cacheCanvas to be drawn to cacheBitmap in memory on cacheCanvas. setBitmap (cacheBitmap); // set the paint color to Paint = new Paint (paint. DITHER_FLAG); paint. setColor (Color. RED); // set the paint style paint. setStyle (Paint. style. STROKE); paint. setStrokeWidth (1); // anti-sawtooth paint. setAntiAlias (true); paint. setDither (true) ;}@ Overridepublic boolean onTouchEvent (MotionEvent event) {// gets the position where the drag event occurs float x = event. getX (); float y = event. getY (); switch (event. getAction () {case MotionEvent. ACTION_DOWN: // manually press path. moveTo (x, y); preX = x; preY = y; break; case MotionEvent. ACTION_MOVE: // manually move the path. quadTo (preX, preY, x, y); preX = x; preY = y; break; case MotionEvent. ACTION_UP: // release cacheCanvas. drawPath (path, paint); path. reset (); break;} invalidate (); // return true indicating that the processing method has handled the event return true;} @ Overridepublic void onDraw (Canvas canvas) {Paint BMP Paint = new Paint (); // draws cacheBitmap to the View component canvas. drawBitmap (cacheBitmap, 0, 0, BMP paint); // draw a canvas along the path. drawPath (path, paint );}}

Import android. app. activity; import android. graphics. blurMaskFilter; import android. graphics. color; import android. graphics. embossMaskFilter; import android. OS. bundle; import android. view. menu; import android. view. menuInflater; import android. view. menuItem; public class HandDraw extends Activity {/* The MaskFilter class can assign edge effects to the Paint. The extension of MaskFilter can be applied to the alpha channel of a Paint edge. Android includes the following maskfilters: BlurMaskFilter specifies a blur style and radius to process the painting edge. EmbossMaskFilter specifies the direction of the light source and the ambient light intensity to add relief effects. To apply a MaskFilter, you can use the setMaskFilter method and pass it a MaskFilter object. */EmbossMaskFilter emboss; BlurMaskFilter blur; @ Overridepublic void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. main); emboss = new EmbossMaskFilter (new float [] {1.5f, 1.5f, 1.5f}, 0.6f, 6, 4.2f); blur = new BlurMaskFilter (8, BlurMaskFilter. blur. NORMAL) ;}@ Override // creates the option Menu public boolean onCreateOptionsMenu (menu Menu) {MenuInflater inflator = new Men UInflater (this); // load R. menu. the menu corresponding to my_menu and add it to inflator in menu. inflate (R. menu. my_menu, menu); return super. onCreateOptionsMenu (menu) ;}@ Override // callback method after the menu item is clicked public boolean onOptionsItemSelected (MenuItem mi) {DrawView dv = (DrawView) findViewById (R. id. draw); // determines which menu item is clicked and responds accordingly. Switch (mi. getItemId () {case R. id. red: dv. paint. setColor (Color. RED); mi. setChecked (true); break; case R. id. green: dv. paint. setColor (Color. GREEN); mi. setChecked (true); break; case R. id. blue: dv. paint. setColor (Color. BLUE); mi. setChecked (true); break; case R. id. width_1: dv. paint. setStrokeWidth (1); break; case R. id. width_3: dv. paint. setStrokeWidth (3); break; case R. id. width_5: dv. paint. setStrokeWidth (5); break; case R. id. blur: dv. paint. setMaskFilter (blur); break; case R. id. emboss: dv. paint. setMaskFilter (emboss); break;} return true ;}}