Android 梯形进度条、下载进度条；

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额，Gif有点卡；

梯形、矩形、圆角、背景色、前景色、进度条中的文字都可以改；

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:gravity="center"

    android:orientation="vertical"

    tools:context=".MainActivity">

    <choi.ccb.com.trapezoidprogress.progressbar.ProgressButton

        android:id="@+id/pb1"

        android:layout_width="match_parent"

        android:layout_height="28dp"

        android:layout_marginLeft="40dp"

        android:layout_marginRight="40dp"

        android:layout_marginTop="15dp"

        app:progressbtn_radius="1"

        app:progressbtn_trapezoid_differ="15dp"

        app:progressbtn_enable_trapezoid="true"

        app:progressbtn_text_size="14dp"

        app:progressbtn_background_color="#43B2BF"

        app:progressbtn_background_second_color="#8D99AF" />

    <Button

        android:id="@+id/bt1"

        android:text="梯形变化"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" />

    <choi.ccb.com.trapezoidprogress.progressbar.ProgressButton

        android:id="@+id/pb2"

        android:layout_width="match_parent"

        android:layout_height="28dp"

        android:layout_marginLeft="40dp"

        android:layout_marginRight="40dp"

        android:layout_marginTop="15dp"

        app:progressbtn_radius="1"

        app:progressbtn_trapezoid_differ="15dp"

        app:progressbtn_enable_trapezoid="false"

        app:progressbtn_text_size="14dp"

        app:progressbtn_background_color="@color/colorAccent"

        app:progressbtn_background_second_color="#ccc" />

    <choi.ccb.com.trapezoidprogress.progressbar.ProgressButton

        android:id="@+id/pb3"

        android:layout_width="match_parent"

        android:layout_height="28dp"

        android:layout_marginLeft="40dp"

        android:layout_marginRight="40dp"

        android:layout_marginTop="15dp"

        app:progressbtn_radius="0"

        app:progressbtn_trapezoid_differ="15dp"

        app:progressbtn_enable_trapezoid="false"

        app:progressbtn_text_size="14dp"

        app:progressbtn_background_color="#43B2BF"

        app:progressbtn_background_second_color="#8D99AF" />

    <choi.ccb.com.trapezoidprogress.progressbar.ProgressButton

        android:id="@+id/pb4"

        android:layout_width="match_parent"

        android:layout_height="28dp"

        android:layout_marginLeft="40dp"

        android:layout_marginRight="40dp"

        android:layout_marginTop="15dp"

        app:progressbtn_radius="1"

        app:progressbtn_trapezoid_differ="15dp"

        app:progressbtn_enable_trapezoid="true"

        app:progressbtn_text_size="14dp"

        app:progressbtn_background_color="#fb2"

        app:progressbtn_background_second_color="#999" />

</LinearLayout>

public class MainActivity extends AppCompatActivity {

    private ProgressButton pb1,pb2,pb3,pb4;

    private Button btn;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        pb1 = findViewById(R.id.pb1);

        pb2 = findViewById(R.id.pb2);

        pb3 = findViewById(R.id.pb3);

        pb4 = findViewById(R.id.pb4);

        btn = findViewById(R.id.bt1);

        btn.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                int num = (int) ((Math.random() * 9 + 1) * 8);

                pb1.setTrapezoidDiffer(num);

            }

        });

    }

    @Override

    protected void onResume() {

        super.onResume();

        simulateProgress();

    }

    private void simulateProgress() {

        ValueAnimator animator = ValueAnimator.ofInt(0, 100);

        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {

            @Override

            public void onAnimationUpdate(ValueAnimator animation) {

                int progress = (int) animation.getAnimatedValue();

                pb2.setProgress(progress);

                pb3.setProgress(progress);

                pb4.setProgress(progress);

            }

        });

        animator.setRepeatCount(ValueAnimator.INFINITE);

        animator.setDuration(4000);

        animator.start();

    }

}