<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/activity_main"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
 android:layout_margin="5dp">
 <TextView
  android:layout_marginTop="50dp"
  android:id="@+id/progress_precent"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="0%"
  android:textColor="#ff00"
  android:textSize="12sp"
  android:padding="3dp"/>
 <ProgressBar
  android:id="@+id/pb_progressbar"
  style="?android:attr/progressBarStyleHorizontal"
  android:layout_width="match_parent"
  android:layout_height="5dp"
  android:max="100"
  android:progress="0"
  android:progressDrawable="@drawable/progressbar_color" />
 <Button
  android:id="@+id/btn_start"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_marginTop="30dp"
  android:text="start" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
 <!-- 背景 gradient是渐变,corners定义的是圆角 -->
 <item android:id="@android:id/background">
  <shape>
   <corners android:radius="5dp" />
   <solid android:color="#9a9a9a" />
  </shape>
 </item>
 <!-- 进度条 -->
 <item android:id="@android:id/progress">
  <clip>
   <shape>
    <corners android:radius="5dp" />
    <solid android:color="#E14f50" />
   </shape>
  </clip>
 </item>
 </layer-list>

 // 得到progressBar控件的宽度
  ViewTreeObserver vto2 = pbProgressbar.getViewTreeObserver();
  vto2.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
   @Override
   public void onGlobalLayout() {
    pbProgressbar.getViewTreeObserver().removeGlobalOnLayoutListener(this);
    width = pbProgressbar.getWidth();
    Log.i("TAG", "MainActivity onCreate()=="+pbProgressbar.getWidth());
   }
  });

 //开启分线程
    new Thread(new Runnable() {
      @Override
      public void run() {
        //每一段要移动的距离
        scrollDistance = (float) ((1.0 / pbProgressbar.getMax()) * width);
        for (int i = 1; i <= status; i++) {
          runOnUiThread(new Runnable() {
            @Override
            public void run() {
              currentStatue++;
              currentPosition += scrollDistance;
              pbProgressbar.incrementProgressBy(1);
              //做一个平移动画的效果
              progressPrecent.setTranslationX(currentPosition);
              progressPrecent.setText(currentStatue + "%");
            }
          });
          try {
            Thread.sleep(80);
          } catch (InterruptedException e) {
            e.printStackTrace();
          }
        }
      }
    }).start();

 //开启分线程
    new Thread(new Runnable() {
      @Override
      public void run() {
        //每一段要移动的距离
        scrollDistance = (float) ((1.0 / pbProgressbar.getMax()) * width);
        for (int i = 0; i < status; i++) {
          runOnUiThread(new Runnable() {
            @Override
            public void run() {
              // 控制进度条的增长进度
              pbProgressbar.incrementProgressBy(1);
              currentStatue++;
              tvPrecent.setText(currentStatue + "%");
              // 得到字体的宽度
              tvWidth = tvPrecent.getWidth();
              currentPosition += scrollDistance;
              //做一个平移动画的效果
              // 这里加入条件判断
              if (tvWidth + currentPosition <= width - tvPrecent.getPaddingRight()) {
                tvPrecent.setTranslationX(currentPosition);
              }
            }
          });
          try {
            Thread.sleep(80);
          } catch (InterruptedException e) {
            e.printStackTrace();
          }
        }
      }
    }).start();