Android 让你的SeekBar 也支持长按事件(3)

实现接口函数：

this.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

@Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                // TODO Auto-generated method stub
                if (SeekBarChange != null) {
                    SeekBarChange.onStopTrackingTouch(seekBarDemo.this);
                }
            }

@Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                // TODO Auto-generated method stub
                if (SeekBarChange != null) {
                    SeekBarChange.onStartTrackingTouch(seekBarDemo.this);
                }
            }

@Override
            public void onProgressChanged(final SeekBar seekBar,
                    final int progress, boolean fromUser) {
                if (SeekBarChange != null) {
                    SeekBarChange.onProgressChanged(seekBarDemo.this, progress,
                            fromUser);
                }
                hand = getHandler(1, seekBarDemo.this, progress);
            }
        });

完整的参考代码如下：

package org.lytsing.Android.qzoneloading;

import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.SeekBar;

public class seekBarDemo extends SeekBar implements OnTouchListener {

private onLong longClick;

/**
     * 长按接口
     * @author terry
     *
     */
    public interface onLong {
        public boolean onLongClick(View v);
    }

private onChange SeekBarChange;

/**
     * 进度改变接口
     * @author terry
     *
     */
    public interface onChange {
        public void onStopTrackingTouch(seekBarDemo seekBar);

public void onStartTrackingTouch(seekBarDemo seekBar);

public void onProgressChanged(seekBarDemo seekBar, int progress,
                boolean fromUser);
    }

    private Handler hand;
    private Runnable runable;
    private Thread th;
    public static int i = 0;
    private boolean isStop = false;
    public static int pp = 0;
    public int index = 0;

public seekBarDemo(Context context) {
        this(context, null);
        // TODO Auto-generated constructor stub
    }

public seekBarDemo(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.setOnTouchListener(this);
        this.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

@Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                // TODO Auto-generated method stub
                if (SeekBarChange != null) {
                    SeekBarChange.onStopTrackingTouch(seekBarDemo.this);
                }
            }

@Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                // TODO Auto-generated method stub
                if (SeekBarChange != null) {
                    SeekBarChange.onStartTrackingTouch(seekBarDemo.this);
                }
            }

@Override
            public void onProgressChanged(final SeekBar seekBar,
                    final int progress, boolean fromUser) {
                if (SeekBarChange != null) {
                    SeekBarChange.onProgressChanged(seekBarDemo.this, progress,
                            fromUser);
                }
                hand = getHandler(1, seekBarDemo.this, progress);
            }
        });
        /**
         * 为runable 赋值
         */
        runable = new Runnable() {
            @Override
            public void run() {
                // TODO Auto-generated method stub
                do {
                    i++;
                    try {
                        Thread.sleep(400);
                        Message msg = hand.obtainMessage();
                        msg.arg1 = i;
                        msg.sendToTarget();
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                } while (isStop);
            }
        };
    }

/**
     * 获取一个handler 对象
     * @param 0代表onTouch 1代表onChange
     * @param 视图对象
     * @param 进度
     * @return 返回一个handler对象
     */
    public Handler getHandler(final int j, final View v, final int progress) {
        Handler h = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                // TODO Auto-generated method stub
                switch (j) {
                case 0:
                    if (msg.arg1 == 3) {
                        if (longClick != null) {
                            longClick.onLongClick(v);
                        }
                    }
                    break;
                case 1:
                    if (msg.arg1 == 1) {
                        pp = progress;
                    }
                    if (msg.arg1 == 2) {
                        if (pp != progress) {
                            i = 0;
                        }
                    }
                    if (msg.arg1 == 3) {
                        i = 0;
                        if (pp == progress) {
                            if (longClick != null) {
                                longClick.onLongClick(seekBarDemo.this);
                            }
                        }
                    }
                    break;
                }
                super.handleMessage(msg);
            }
        };
        return h;
    }

/**
     * 设置长按事件
     * @param longClick
     */
    public void setOnLongSeekBarClick(onLong longClick) {
        this.longClick = longClick;
    }

/**
     * 设置进度改变事件
     * @param change
     */
    public void setOnSeekBarChange(onChange change) {
        this.SeekBarChange = change;
    }

@Override
    public boolean onTouch(final View v, MotionEvent event) {
        // TODO Auto-generated method stub
        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            isStop = true;
            th = new Thread(runable);
            th.start();
            i = 0;
            hand = getHandler(0, v, 0);
            break;
        case MotionEvent.ACTION_UP:
            isStop = false;
            break;
        }
        return false;
    }
}

在布局的XML可以如下定义：

<org.lytsing.android.qzoneloading.seekBarDemo
        android:max="200" android:id="@+id/seek" android:layout_width="fill_parent"
        android:layout_height="wrap_content">
    </org.lytsing.android.qzoneloading.seekBarDemo>

功能至此完成，在前台可以像我们之前使用SeekBar 一样使用，功能一样，大家也可以根据自己的需求再另行扩展。这里给出的只是一个思路。