android开发之进度条

1、普通进度条
            android:id="@+id/firstBar"
        //设置进度条的样式为水平的
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        //设置进度条为不可见
        android:visibility="gone" />
2、圆形进度条
                android:id="@+id/secondBar"
        //设置进度条的样式为圆的
        style="?android:attr/progressBarStyle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="gone" />

package com.example.progressbar;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;


public class MainActivity extends Activity
{
    private ProgressBar firstbar = null;
    private ProgressBar secondbar = null;
    private Button pbtn = null;
    private int i = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        firstbar = (ProgressBar)findViewById(R.id.firstBar);
        secondbar = (ProgressBar)findViewById(R.id.secondBar);
        pbtn = (Button)findViewById(R.id.pbtn);
        pbtn.setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                // TODO Auto-generated method stub
                if(i == 0)
                {
                    firstbar.setVisibility(View.VISIBLE); //将第一个进度条设置为可见
                    secondbar.setVisibility(View.VISIBLE);//将第二个进度条设置为可见
                }
                else if(i < 100)
                {
                    //在第一个进度条里有两个进度
                    firstbar.setProgress(i); //设置进度条走到哪里
                    firstbar.setSecondaryProgress(i+10);//设置进度条走到哪里
                    secondbar.setProgress(i);
                }
                else if(i>=100)
                {
                    i=0;
                }
                else
                {
                    firstbar.setVisibility(View.GONE);//将进度条设置为不可见
                    secondbar.setVisibility(View.GONE);//将进度条设置为不可见
                }
                i=i+10;
            }
        });
    }

}

3、带滑块的进度条seekBar
    seekBar的使用方法：
     1、在布局文件中声明SeekBar
                  android:id="@+id/seekBar"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
   2、定义一个OnSeekBarChangeListener,也就是为SeekBar设置监听器
    class SeekBarListener implements OnSeekBarChangeListener{
    @Override
        //当进度条发生改变的时候调用该函数，注意，这里的改变包括进度条自动变化，或者用手拖动进度条的滑块
        public void onProgressChanged(SeekBar seekBar, int progress,
        boolean fromUser)
        {
            // TODO Auto-generated method stub

        }
        @Override
        //当用户开始拖动滑块时调用该函数
        public void onStartTrackingTouch(SeekBar seekBar)
        {
            // TODO Auto-generated method stub

        }
        @Override
        //当用户停止拖动滑块时调用该函数
        public void onStopTrackingTouch(SeekBar seekBar)
        {
        // TODO Auto-generated method stub

        }
        }

 源代码

public class MainActivity extends Activity
{
    private SeekBar seekBar = null;

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

        seekBar = (SeekBar)findViewById(R.id.seekBar);
        seekBar.setOnSeekBarChangeListener(new SeekBarListener());
    }

    class SeekBarListener implements OnSeekBarChangeListener{

        @Override
        public void onProgressChanged(SeekBar seekBar, int progress,
                boolean fromUser)
        {
            // TODO Auto-generated method stub
            //打印当前进度条的位置
            System.out.println(progress);
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar)
        {
            // TODO Auto-generated method stub
            //当用户开始拖动滑块时，进度条的位置
            System.out.println("start-->" + seekBar.getProgress());
        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar)
        {
            // TODO Auto-generated method stub
            //当用户停止拖动滑块时，进度条的位置
            System.out.println("end-->" + seekBar.getProgress());
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

布局文件

<RelativeLayout xmlns:android=""
    xmlns:tools=""
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
    <SeekBar
        android:id="@+id/seekBar"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />

</RelativeLayout>

4、星状进度条RatingBar
/*RatingBar的使用方法
 * 1、在布局文件中声明一个RatingBar
 *             android:id="@+id/ratingBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        //设置ratingBar的星的个数
        android:numStars="5"
        //设置每一次拖动走的大小为1个星
        android:stepSize="1.0"
        />
   2、定义一个OnRatingBarListener，为ratingBar设置监听器
    class RatingBarListener implements RatingBar.OnRatingBarChangeListener{
        @Override
        //当用户拖动ratingBar时调用该函数
        public void onRatingChanged(RatingBar ratingBar, float rating,
        boolean fromUser)
        {
                // TODO Auto-generated method stub


        }
     }
 */


源代码

public class MainActivity extends Activity
{
    private RatingBar ratingBar = null;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //找打ratingBar
        ratingBar = (RatingBar)findViewById(R.id.ratingBar);
        //绑定监听器
        ratingBar.setOnRatingBarChangeListener(new RatingBarListener());
    }

    class RatingBarListener implements RatingBar.OnRatingBarChangeListener{
        @Override
        //当用户拖动ratingBar时调用该函数
        public void onRatingChanged(RatingBar ratingBar, float rating,
                boolean fromUser)
        {
            // TODO Auto-generated method stub
            System.out.println("ratingBar" + rating);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

布局文件

<RelativeLayout xmlns:android=""
    xmlns:tools=""
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <RatingBar
        android:id="@+id/ratingBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:numStars="5"
        android:stepSize="1.0"
        />

</RelativeLayout>