自定義(MyButton)按鈕
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, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public MyButton(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
/**
*
* @param canvas 畫布
* Paint 畫筆
*/
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawColor(Color.RED);
//實例化路徑
Path path=new Path();
path.moveTo(100,100);
path.lineTo(300,100);
path.lineTo(100,300);
path.lineTo(200,10);
path.lineTo(250,300);
path.lineTo(100,100);
//實例化一個畫筆
Paint paint=new Paint();
paint.setColor(Color.YELLOW);
//設置空心
paint.setStyle(Paint.Style.STROKE);
//設置畫筆的粗細
paint.setStrokeWidth(20);
//畫路徑
canvas.drawPath(path,paint);
//設置畫筆的粗細
paint.setStrokeWidth(3);
paint.setColor(Color.GREEN);
//設置字的大小
paint.setTextSize(38);
//畫文字
canvas.drawText("呵呵呵",150,150,paint);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
Log.i("test","自定義的按鈕的觸摸事件---->回調");
return false;
}
}
MainActivity.java
@Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); //設置寬和高 setMeasuredDimension(500,300); }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); //給自定義按鈕設置觸摸事件 mbtn_main_button.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { Log.i("test","自定義的按鈕的觸摸事件---->監聽"); return false; } }); //給root設置觸摸事件 root.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { Log.i("test","自定義的按鈕所在佈局的觸摸事件---->監聽"); return false; } }); } @Override public boolean onTouchEvent(MotionEvent event) { Log.i("test","自定義的按鈕所在Activity的觸摸事件---->回調"); return true; }
//第二種設置高和寬的方法:用Java代碼重寫onMeasure方法
@Override
protected void onMeasure(int widthMeasureSpec,int heightMeasureSpec){
super.onMeasure(widthMeasureSpec,HeightMeasureSpec);
//設置寬和高
setMeasureDimension(400,500);
}
} activity_main.xml
<?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">
<!--設置高和寬第一種方法:在xml中直接設置-->
<com.zking.administrator.g160628_android18_diyui_touch.MyButton
android:layout_width="300px"
android:layout_height="300px"
android:id="@+id/mbtn_main_button"
/>
<com.zking.administrator.g160628_android18_diyui_touch.MyButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/mbtn_main_button"
/>
</LinearLayout>