单点触摸

1.代码演示:

(1)布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:id="@+id/root"
    tools:context="com.zking.administrator.g160628_android18_diyui_touch.MainActivity">

    <com.zking.administrator.g160628_android18_diyui_touch.MyButton
        android:layout_width="300px"
        android:layout_height="300px"
        android:id="@+id/mbtn_main_button"
        />
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="俺是自带的按钮"
        />

</LinearLayout>

(2)activity
package com.zking.administrator.g160628_android18_diyui_touch;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {

    private MyButton mbtn_main_button;
    private LinearLayout root;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mbtn_main_button = (MyButton) findViewById(R.id.mbtn_main_button);
        root = (LinearLayout) findViewById(R.id.root);
        //给自定义按钮设置触摸事件
        mbtn_main_button.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                Log.i("test","自定义的按钮的触摸事件---->监听");
                return false;
            }
        });
        //给root设置触摸事件
        root.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                Log.i("test","自定义的按钮所在布局的触摸事件---->监听");
                return false;
            }
        });
    }


    @Override
    public boolean onTouchEvent(MotionEvent event) {
        Log.i("test","自定义的按钮所在Activity的触摸事件---->回调");
        return true;
    }
}

 

(3)activity

package com.zking.administrator.g160628_android18_diyui_touch;

 

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.graphics.Path;

import android.support.annotation.Nullable;

import android.util.AttributeSet;

import android.util.Log;

import android.view.MotionEvent;

import android.view.View;

 

/**

 *Created by Administrator on 2017/7/8 0008.

 */

 

public class MyButton extends View {

 

   public MyButton(Context context) {

       super(context);

    }

 

   public MyButton(Context context, @Nullable AttributeSet attrs) {

       super(context, attrs);

    }

 

   public MyButton(Context context, @Nullable AttributeSet attrs, intdefStyleAttr) {

       super(context, attrs, defStyleAttr);

    }

 

    public MyButton(Context context, @NullableAttributeSet attrs, int defStyleAttr, int defStyleRes) {

       super(context, attrs, defStyleAttr, defStyleRes);

    }

 

   /**

    *

    * @param canvas 画布

    *         Paint  画笔

    */

   @Override

    protectedvoid onDraw(Canvas canvas) {

       super.onDraw(canvas);

 

       canvas.drawColor(Color.RED);

       //实例化路径

       Path path=new Path();

       path.moveTo(100,100);

       path.lineTo(300,100);

       path.lineTo(150,300);

       path.lineTo(200,50);

       path.lineTo(250,300);

       path.lineTo(100,100);

       //实例化一个画笔

       Paint paint=new Paint();

       paint.setColor(Color.YELLOW);

 

       //设置空心

       paint.setStyle(Paint.Style.STROKE);

       //设置画笔的粗细

       paint.setStrokeWidth(20);

 

       //画路径

       canvas.drawPath(path,paint);

 

       //设置画笔的粗细

       paint.setStrokeWidth(3);

       paint.setColor(Color.GREEN);

       //设置字的大小

       paint.setTextSize(38);

       //画文字

       canvas.drawText("胡哥好帅",150,150,paint);

    }

 

   @Override

   public boolean onTouchEvent(MotionEvent event) {

       Log.i("test","自定义的按钮的触摸事件---->回调");

       return false;

    }

}