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：

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">

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" />

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();

}

}