Android开源：CProgressButton -仿 iOS 的下载按钮

   <h2>CProgressButton</h2>    <p>a circle progress button like iOS</p>    <p style="text-align:center"><img src="https://simg.open-open.com/show/b1dd11e4dcd60ce47dff1d4228fd3d9a.gif"></p>    <h2>Usage:</h2>    <h3>code</h3>    <pre>  <code class="language-java">final CProgressButton progressButton = (CProgressButton)findViewById(R.id.btn);          progressButton.setbgDrawable(R.drawable.bounder,40); //config  bg          progressButton.setStroke(1,R.color.colorAccent);  //config stroke color          final TextView tv = (TextView) findViewById(R.id.state);          progressButton.setOnClickListener(new View.OnClickListener() {              @Override              public void onClick(View v) {                  ValueAnimator valueAnimator = ValueAnimator.ofInt(0,100);                  if(progressButton.getState() == CProgressButton.STATE.NORMAL){                      progressButton.setState(CProgressButton.STATE.PROGRESS);                      valueAnimator.setDuration(5000);                      valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {                          @Override                          public void onAnimationUpdate(ValueAnimator animation) {                              int value = (int)animation.getAnimatedValue();                              tv.setText("state progress:"+value);                              if(value == 100){                                  progressButton.setState(CProgressButton.STATE.NORMAL);                                  tv.setText("state normal");                                  progressButton.setText("Finish");                              }                              progressButton.setProgress(value);                          }                      });                      valueAnimator.start();                  }else{                      valueAnimator.cancel();                      progressButton.setState(CProgressButton.STATE.NORMAL);                      tv.setText("state normal");                      progressButton.setText("Continue");                  }                }          });</code></pre>    <h3>layout</h3>    <pre>  <code class="language-java"><com.jiang.android.cprogressbutton.CProgressButton          android:layout_width="65dp"          android:layout_marginLeft="50dp"          android:text="Download"          android:gravity="center"          android:textSize="12sp"          android:textColor="@color/colorAccent"          android:id="@+id/btn"          android:layout_height="30dp" /></code></pre>    <h3>License</h3>    <pre>  <code class="language-java">Copyright 2016 NewTab    Licensed under the Apache License, Version 2.0 (the "License");  you may not use this file except in compliance with the License.  You may obtain a copy of the License at        http://www.apache.org/licenses/LICENSE-2.0    Unless required by applicable law or agreed to in writing, software  distributed under the License is distributed on an "AS IS" BASIS,  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the specific language governing permissions and  limitations under the License.</code></pre>    <p> </p>    <p> </p>    <p> </p>