ProgressBar三种style

在res下的drawable文件夹下，创建样式

custom_progress.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background">
        <shape android:shape="rectangle">
        <corners android:radius="5dp"/>
        <gradient android:startColor="#fff"
                  android:endColor="#fff"/>
        </shape>
    </item>
    <item android:id="@android:id/progress">
        <clip><!--可裁剪对象-->
            <shape android:shape="rectangle">
            <corners android:radius="5dp"/>
            <gradient android:angle="45" 
                      android:startColor="#f00"
                      android:endColor="#f90"/>
            </shape>
        </clip>
    </item>
</layer-list>

布局xml，需要指定ProgressBar的style

    <ProgressBar
        android:id="@+id/progressSelf"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        style="@style/Widget.AppCompat.ProgressBar.Horizontal"
        android:progressDrawable="@drawable/custom_progress"
        />
    <TextView
        android:id="@+id/tvProgress"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />

设置进度java文件

        final ProgressBar bar = (ProgressBar) findViewById(R.id.progressSelf);
        final TextView textView= (TextView) findViewById(R.id.tvProgress);
        new Thread(){
            @Override
            public void run() {
                int i=0;
                while(i<100){
                    i++;
                    try {
                        Thread.sleep(80);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    final int j=i;
                    bar.setProgress(i);
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            textView.setText(j+"%");
                        }
                    });
                }
            }
        }.start();