optimize drawing:introduce background and foreground

Author: huangziwei

README.md

@@ -143,7 +143,27 @@ mDoodleView.setPen(DoodlePen.TEXT);
 mDoodleView.setShape(DoodleShape.HAND_WRITE);
 mDoodleView.setColor(new DoodleColor(Color.RED));
 
+
+```
+When turning off optimized drawing, you only need to call `addItem(IDoodleItem)` when you create it. When you start optimizing drawing, the created or selected item needs to call `markItemToOptimizeDrawing(IDoodleItem)`, and you should call `notifyItemFinishedDrawing(IDoodleItem)` when you finish drawing. So this is generally used in code:
+***当关闭优化绘制时,只需要在创建时调用`addItem(IDoodleItem)`;而当开启优化绘制时，创建或选中的item需要调用`markItemToOptimizeDrawing(IDoodleItem)`,结束绘制时应调用`notifyItemFinishedDrawing(IDoodleItem)`。因此在代码中一般这样使用：***
+```
+// begin drawing
+if (mDoodle.isOptimizeDrawing()) {
+   mDoodle.markItemToOptimizeDrawing(item);
+} else {
+   mDoodle.addItem(item);
+}
+
+...
+
+// finish drawing
+if (mDoodle.isOptimizeDrawing()) {
+   mDoodle.notifyItemFinishedDrawing(item);
+}
 ```
+
+
 Then, add the DoodleView to your layout. Now you can start doodling freely.
 
  ***把DoodleView添加到布局中，然后开始涂鸦。***

app/build.gradle

@@ -26,9 +26,9 @@ dependencies {
         transitive = false
     }
 
-    // test
+/*    // test
     debugImplementation 'com.squareup.leakcanary:leakcanary-android:1.6.2'
     releaseImplementation 'com.squareup.leakcanary:leakcanary-android-no-op:1.6.2'
     // Optional, if you use support library fragments:
-    debugImplementation 'com.squareup.leakcanary:leakcanary-support-fragment:1.6.2'
+    debugImplementation 'com.squareup.leakcanary:leakcanary-support-fragment:1.6.2'*/
 }

app/src/main/java/cn/hzw/doodledemo/DemoApplication.java

@@ -2,17 +2,15 @@
 
 import android.app.Application;
 
-import com.squareup.leakcanary.LeakCanary;
-
 public class DemoApplication extends Application {
     @Override
     public void onCreate() {
         super.onCreate();
-        if (LeakCanary.isInAnalyzerProcess(this)) {
+/*        if (LeakCanary.isInAnalyzerProcess(this)) {
             // This process is dedicated to LeakCanary for heap analysis.
             // You should not init your app in this process.
             return;
         }
-        LeakCanary.install(this);
+        LeakCanary.install(this);*/
     }
 }

app/src/main/java/cn/hzw/doodledemo/MosaicDemo.java

@@ -58,7 +58,7 @@ public void onReady(IDoodle doodle) {
         findViewById(R.id.btn_mosaic_x3).performClick(); // see setMosaicLevel(View view)
 
         // step 4
-        ViewGroup container = findViewById(R.id.doodle_container);
+        ViewGroup container = (ViewGroup) findViewById(R.id.doodle_container);
         container.addView(doodleView);
     }
 

app/src/main/java/cn/hzw/doodledemo/ScaleGestureItemDemo.java

@@ -91,7 +91,7 @@ public void onClick(View v) {
         doodleView.setColor(new DoodleColor(Color.RED));
 
         // step 4
-        ViewGroup container = findViewById(R.id.doodle_container);
+        ViewGroup container = (ViewGroup) findViewById(R.id.doodle_container);
         container.addView(doodleView);
     }
 

app/src/main/java/cn/hzw/doodledemo/guide/DoodleGuideActivity.java

@@ -16,17 +16,17 @@ protected void onCreate(Bundle savedInstanceState) {
         setContentView(R.layout.activity_guide);
 
         // 初级涂鸦
-        ViewGroup simpleContainer = findViewById(R.id.container_simple_doodle);
+        ViewGroup simpleContainer = (ViewGroup) findViewById(R.id.container_simple_doodle);
         SimpleDoodleView simpleDoodleView = new SimpleDoodleView(this);
         simpleContainer.addView(simpleDoodleView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
 
         // 中级涂鸦
-        ViewGroup middleContainer = findViewById(R.id.container_middle_doodle);
+        ViewGroup middleContainer = (ViewGroup) findViewById(R.id.container_middle_doodle);
         MiddleDoodleView middleDoodleView = new MiddleDoodleView(this);
         middleContainer.addView(middleDoodleView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
 
         // 高级级涂鸦
-        ViewGroup advancedContainer = findViewById(R.id.container_advanced_doodle);
+        ViewGroup advancedContainer = (ViewGroup) findViewById(R.id.container_advanced_doodle);
         Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.thelittleprince2);
         AdvancedDoodleView advancedDoodleView = new AdvancedDoodleView(this, bitmap);
         advancedContainer.addView(advancedDoodleView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));

doodle/src/main/java/cn/hzw/doodle/DoodleActivity.java

@@ -169,6 +169,7 @@ public void onCreate(Bundle savedInstanceState) {
             this.finish();
             return;
         }
+
         LogUtil.d("TAG", mImagePath);
         if (mDoodleParams.mIsFullScreen) {
             getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
@@ -441,7 +442,7 @@ public void onClick(View v) {
         });
         mSelectedEditContainer = findViewById(R.id.doodle_selectable_edit_container);
         mSelectedEditContainer.setVisibility(View.GONE);
-        mItemScaleTextView = findViewById(R.id.item_scale);
+        mItemScaleTextView = (TextView) findViewById(R.id.item_scale);
         mItemScaleTextView.setOnLongClickListener(new View.OnLongClickListener() {
             @Override
             public boolean onLongClick(View v) {
@@ -465,7 +466,7 @@ public boolean onLongClick(View v) {
 
         mBtnColor = DoodleActivity.this.findViewById(R.id.btn_set_color);
         mColorContainer = DoodleActivity.this.findViewById(R.id.btn_set_color_container);
-        mEditSizeSeekBar = findViewById(R.id.doodle_seekbar_size);
+        mEditSizeSeekBar = (SeekBar) findViewById(R.id.doodle_seekbar_size);
         mEditSizeSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
             @Override
             public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

doodle/src/main/java/cn/hzw/doodle/DoodleOnTouchGestureListener.java

@@ -175,7 +175,9 @@ public void onScrollEnd(MotionEvent e) {
         }
 
         if (mCurrDoodlePath != null) {
-            mDoodle.notifyItemFinishedDrawing(mCurrDoodlePath);
+            if (mDoodle.isOptimizeDrawing()) {
+                mDoodle.notifyItemFinishedDrawing(mCurrDoodlePath);
+            }
             mCurrDoodlePath = null;
         }