Android NumberProgressBar：动态移动显示百分比进度的进度条



Android NumberProgressBar：动态移动显示百分比进度的进度条

NumberProgressBar是github上一个开源项目，其项目主页是：https://github.com/daimajia/NumberProgressBar


NumberProgressBar特点是当进度条在前进时候，显示出来的百分比进度数字随进度条实时显示出来，如图：

这种特点在实现一些比如下载、加载功能模块时候比较有用。如果实现上图结果，先写xml布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:custom="http://schemas.android.com/apk/res-auto"
    tools:context="zhangphil.demo.MainActivity">

    <com.daimajia.numberprogressbar.NumberProgressBar
        android:id="@+id/number_progress_bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        custom:progress_unreached_color="@android:color/darker_gray"
        custom:progress_reached_color="@android:color/holo_red_light"
        custom:progress_unreached_bar_height="5dp"
        custom:progress_reached_bar_height="15dp"
        custom:progress_text_size="30sp"
        custom:progress_text_color="@android:color/holo_blue_bright"
        custom:progress_text_offset="1dp"
        custom:progress_text_visibility="visible" />

</RelativeLayout>

上层Java代码：

package zhangphil.demo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;

import com.daimajia.numberprogressbar.NumberProgressBar;
import com.daimajia.numberprogressbar.OnProgressBarListener;

import java.util.Timer;
import java.util.TimerTask;

public class MainActivity extends AppCompatActivity {

    private Timer timer;
    private NumberProgressBar mNumberProgressBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mNumberProgressBar = (NumberProgressBar) findViewById(R.id.number_progress_bar);
        mNumberProgressBar.setOnProgressBarListener(new OnProgressBarListener() {
            @Override
            public void onProgressChange(int current, int max) {
                if (current == max) {
                    timer.cancel();

                    Toast.makeText(getApplicationContext(), "完成！", Toast.LENGTH_SHORT).show();
                    mNumberProgressBar.setProgress(0);
                }
            }
        });

        mNumberProgressBar.setProgress(0);
        mNumberProgressBar.setMax(100);

        timer = new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        mNumberProgressBar.incrementProgressBy(1);
                    }
                });
            }
        }, 2000, 50);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        timer.cancel();
    }
}

附录文章：

1，《Android CircleProgress：可自由定制实现各种样式圆形加载进度》链接地址：http://blog.csdn.net/zhangphil/article/details/50095901


2，《Android计时器TimerTask，Timer，Handler》链接地址：http://blog.csdn.net/zhangphil/article/details/43908499