android滑动基础篇 TouchView

效果图：

代码部分：

activity类代码：

package com.TouchView;

import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;

public class TouchView extends Activity {

    private TextView eventlable;
    private TextView histroy;
    private TextView TouchView;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        TouchView =(TextView)findViewById(R.id.touch_area);
        histroy =(TextView)findViewById(R.id.history_label);
        eventlable =(TextView)findViewById(R.id.event_label);

        TouchView.setOnTouchListener(new View.OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                int action =event.getAction();
                switch(action){
                //当按下的时候
                case (MotionEvent.ACTION_DOWN):
                    Display("ACTION_DOWN",event);
                break;
                //当按上的时候
                case(MotionEvent.ACTION_UP):
                    int historysize=ProcessHistory(event);
                    histroy.setText("历史数据"+historysize);
                    Display("ACTION_UP",event);
                    break;
                 //当触摸的时候
                case(MotionEvent.ACTION_MOVE):
                    Display("ACTION_MOVE",event);
                }
                return true;
            }
        });
    }
    public void Display(String eventType,MotionEvent event){
        //触点相对坐标的信息
        int x =(int) event.getX();
        int y=(int)event.getY();
        //表示触屏压力大小
        float pressure =event.getPressure();
        //表示触点尺寸
        float size=event.getSize();
        //获取绝对坐标信息
        int RawX=(int)event.getRawX();
        int RawY=(int)event.getRawY();

        String msg="";

        msg+="事件类型"+eventType+"\n";
        msg+="相对坐标"+String.valueOf(x)+","+String.valueOf(y)+"\n";
        msg+="绝对坐标"+String.valueOf(RawX)+","+String.valueOf(RawY)+"\n";
        msg+="触点压力"+String.valueOf(pressure)+",";
        msg+="触点尺寸"+String.valueOf(size)+"\n";
        eventlable.setText(msg);
    }
    public int ProcessHistory(MotionEvent event){
        int history =event.getHistorySize();
        for(int i=0;i<history;i++){
            long time=event.getHistoricalEventTime(i);
            float pressure=event.getHistoricalPressure(i);
            float x=event.getHistoricalX(i) ;
            float y=event.getHistoricalY(i);
            float size=event.getHistoricalSize(i);
        }

        return history;

    }

}

MAIN.XML代码部分：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView
    android:id="@+id/touch_area"
    android:layout_width="fill_parent"
    android:layout_height="300dip"
    android:background="#0FF"
    android:textColor="#FFFFFF"
    android:text="触摸事件测试区"

    />
    <TextView
    android:id="@+id/history_label"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="历史数据"

    />
    <TextView
    android:id="@+id/event_label"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="触摸事件："

    />
</LinearLayout>