Android学习07-事件处理(四)键盘事件和触摸事件

七、键盘事件

Main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >	<TextView 		android:layout_width="wrap_content"		android:layout_height="wrap_content" 		android:text="请输入EMAIL地址：" />		<EditText		android:id="@+id/input"		android:layout_width="wrap_content"		android:layout_height="wrap_content"		android:selectAllOnFocus="true" />		<ImageView		android:id="@+id/img"		android:layout_width="wrap_content"		android:layout_height="wrap_content"		android:src="@drawable/wrong"/></LinearLayout>

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Activity：

package com.iflytek.activity;import android.app.Activity;import android.os.Bundle;import android.view.KeyEvent;import android.view.View;import android.view.View.OnKeyListener;import android.widget.EditText;import android.widget.ImageView;public class EventActivity extends Activity {	private EditText input = null;	private ImageView img = null;	/** Called when the activity is first created. */	@Override	public void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		super.setContentView(R.layout.main);		this.input = (EditText) super.findViewById(R.id.input); // 取得组件		this.img = (ImageView) super.findViewById(R.id.img); // 取得组件		this.input.setOnKeyListener(new OnKeyListenerImpl());	}	private class OnKeyListenerImpl implements OnKeyListener {		public boolean onKey(View v, int keyCode, KeyEvent event) {			switch (event.getAction()) {			case KeyEvent.ACTION_UP:				String msg = EventActivity.this.input.getText().toString(); // 取得输入的文字信息				if (msg.matches("\\w+@\\w+\\.\\w+")) { // 验证通过					EventActivity.this.img.setImageResource(R.drawable.right); // 设置正确图片				} else {					EventActivity.this.img.setImageResource(R.drawable.wrong); // 设置错误图片				}			case KeyEvent.ACTION_DOWN: // 键盘按下				break;			}			return false;		}	}}

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八、触摸事件

Demo01_获取坐标:

Main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >	<TextView 		android:id="@+id/info"		android:layout_width="fill_parent"		android:layout_height="fill_parent"/></LinearLayout>

Activity：

package com.iflytek.activity;import android.app.Activity;import android.os.Bundle;import android.view.MotionEvent;import android.view.View;import android.view.View.OnTouchListener;import android.widget.TextView;public class EventActivity extends Activity {		private TextView info = null;	    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);            	this.info = (TextView) super.findViewById(R.id.info);		this.info.setOnTouchListener(new OnTouchListenerImpl());    }    	private class OnTouchListenerImpl implements OnTouchListener {		public boolean onTouch(View v, MotionEvent event) {			EventActivity.this.info.setText("X = " + event.getX() + "，Y = "					+ event.getY()); // 设置文本			return false;		}	}}

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Demo02_绘图：

Main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >	<com.iflytek.activity.MyPaintView		android:id="@+id/paintView"		android:layout_width="fill_parent"		android:layout_height="fill_parent"/></LinearLayout>

Activity：

package com.iflytek.activity;import android.app.Activity;import android.os.Bundle;public class EventActivity extends Activity {    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);    }}

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MyPaintView.java:

package com.iflytek.activity;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Point;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;/** * @author xdwang *  * @create 2012-9-3 下午9:46:43 *  * @email:[email protected] *  * @description *  */public class MyPaintView extends View {	private List<Point> allPoint = new ArrayList<Point>(); // 保存所有的操作坐标	public MyPaintView(Context context, AttributeSet attrs) { // 接收Context，同时接收属性集合		super(context, attrs); // 调用父类的构造		super.setOnTouchListener(new OnTouchListenerImpl());	}	private class OnTouchListenerImpl implements OnTouchListener {		public boolean onTouch(View v, MotionEvent event) {			Point p = new Point((int) event.getX(), (int) event.getY()); // 将坐标保存在Point类			if (event.getAction() == MotionEvent.ACTION_DOWN) { // 按下，表示重新开始保存点				MyPaintView.this.allPoint = new ArrayList<Point>(); // 重绘				MyPaintView.this.allPoint.add(p); // 保存点			} else if (event.getAction() == MotionEvent.ACTION_UP) { // 用户松开				MyPaintView.this.allPoint.add(p); // 记录坐标点				MyPaintView.this.postInvalidate(); // 重绘图形			} else if (event.getAction() == MotionEvent.ACTION_MOVE) { // 用户移动				MyPaintView.this.allPoint.add(p); // 记录坐标点				MyPaintView.this.postInvalidate(); // 重绘图形			}			return true; // 表示下面的操作不再执行了。		}	}	@Override	protected void onDraw(Canvas canvas) { // 进行绘图		Paint p = new Paint(); // 依靠此类开始画线		p.setColor(Color.RED);// 定义图的颜色		if (MyPaintView.this.allPoint.size() > 1) { // 现在有坐标点保存的时候可以开始进行绘图			Iterator<Point> iter = MyPaintView.this.allPoint.iterator();			Point first = null;			Point last = null;			while (iter.hasNext()) {				if (first == null) {					first = (Point) iter.next(); // 取出坐标				} else {					if (last != null) { // 前一阶段已经完成了						first = last; // 重新开始下一阶段					}					last = (Point) iter.next(); // 结束点坐标					canvas.drawLine(first.x, first.y, last.x, last.y, p);				}			}		}	}}

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