自定义View
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1.组合View
例如:
放在drawable文件下的EditText背景
<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"><solid android:color="#FFFFFF" /><!--<corners android:radius="3dip"/>--><stroke android:width="1dip" android:color="#BDC7D8" /></shape>
xml:
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" android:weightSum="1"> <TextView android:id="@+id/txt_delete" android:layout_width="30dp" android:layout_height="30dp" android:text="减" android:gravity="center" android:background="#8b948b"/> <EditText android:id="@+id/et_number" android:layout_marginTop="2dp" android:layout_width="50dp" android:layout_height="30dp" android:background="@drawable/edit" android:layout_weight="0.00" android:gravity="center" android:text="1"/> <TextView android:id="@+id/txt_add" android:layout_width="30dp" android:layout_height="30dp" android:text="加" android:gravity="center" android:background="#8b948b"/></LinearLayout>
自定义控件类class
public class AddDeleteView extends LinearLayout { private OnAddDelClickListener listener; private EditText etNumber; //对外提供一个点击的回调接口 interface OnAddDelClickListener{ void onAddClick(View v); void onDelClick(View v); } public void setOnAddDelClickListener(OnAddDelClickListener listener){ if(listener!=null){ this.listener=listener; } } public AddDeleteView(Context context) { this(context,null); } public AddDeleteView(Context context, AttributeSet attrs) { this(context, attrs,0); } public AddDeleteView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initView(context, attrs, defStyleAttr); } private void initView(Context context, AttributeSet attrs, int defStyleAttr) { View.inflate(context,R.layout.layout_add_delete,this); //获取控件 TextView txtDelete=findViewById(R.id.txt_delete); TextView txtAdd=findViewById(R.id.txt_add); etNumber = findViewById(R.id.et_number); TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.AddDeleteViewStyle); String leftText = typedArray.getString(R.styleable.AddDeleteViewStyle_left_text); String rightText = typedArray.getString(R.styleable.AddDeleteViewStyle_right_text); String middleText = typedArray.getString(R.styleable.AddDeleteViewStyle_middle_text); int color = typedArray.getColor(R.styleable.AddDeleteViewStyle_left_text_color, Color.RED); txtDelete.setText(leftText); txtAdd.setText(rightText); etNumber.setText(middleText); txtDelete.setTextColor(color); //回收 typedArray.recycle(); txtDelete.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { listener.onDelClick(view); } }); txtAdd.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { listener.onAddClick(view); } }); } //对外提供一个修改数字的方法 public void setNumber(int number){ if(number>0){ etNumber.setText(number+""); } } //对外提供一个获取当前数字的方法 public int getNumber(){ String string = etNumber.getText().toString(); int i = Integer.parseInt(string); return i; }}自定义控件属性
//在res/values/中创建arrts
<?xml version="1.0" encoding="utf-8"?><resources> <declare-styleable name="AddDeleteViewStyle"> <attr name="left_text" format="string"></attr> <attr name="right_text" format="string"></attr> <attr name="middle_text" format="string"></attr> <attr name="left_text_color" format="color"></attr> </declare-styleable></resources>
全路径引入
<com.example.xx.day02_viewgroup_view.AddDeleteView android:id="@+id/adv" android:layout_width="match_parent" android:layout_height="wrap_content" app:left_text="减" app:right_text="加" app:middle_text="2" app:left_text_color="#c8bf40" > </com.example.xx.day02_viewgroup_view.AddDeleteView>
activity 控制
public class MainActivity extends AppCompatActivity { private AddDeleteView adv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); adv = (AddDeleteView) findViewById(R.id.adv); adv.setOnAddDelClickListener(new AddDeleteView.OnAddDelClickListener() { @Override public void onAddClick(View v) { int number = adv.getNumber(); number++; adv.setNumber(number); } @Override public void onDelClick(View v) { int number = adv.getNumber(); number--; adv.setNumber(number); } }); }2.画View
package com.example.xx.day02_viewgroup_view;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.AttributeSet;import android.view.View;/** * 作者：戈鹏 * on 2017/11/1 20:50 */public class MyView extends View { public MyView(Context context) { this(context,null); } public MyView(Context context, AttributeSet attrs) { this(context, attrs,0); } public MyView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } /** * 自定义方法最重要的方法 * Canvas 画布 * @param canvas */ @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); //画笔 抗锯齿 Paint paint=new Paint(Paint.ANTI_ALIAS_FLAG); //画笔颜色 paint.setColor(Color.BLUE); //不填充 paint.setStyle(Paint.Style.STROKE); //设置粗体 paint.setFakeBoldText(true); /** * cx：圆心的x坐标。 * cy：圆心的y坐标。 *radius：圆的半径。 *paint：绘制时所使用的画笔。 */ //画圆 单位是px像素 canvas.drawCircle(DensityUtil.dip2px(getContext(),50),DensityUtil.dip2px(getContext(),50), DensityUtil.dip2px(getContext(),50),paint); //划路径 /*Path path = new Path(); path.moveTo(0,0); path.lineTo(DensityUtil.dip2px(getContext(),50),DensityUtil.dip2px(getContext(),50)); path.lineTo(0,DensityUtil.dip2px(getContext(),100)); canvas.drawPath(path,paint);*/ //画矩形 /** * x矩形左上角的 x 坐标 * y矩形左上角的 y 坐标 * width矩形的宽度，以像素计 * height矩形的高度，以像素计 */ paint.reset(); paint.setColor(Color.RED); /*canvas.drawRect(DensityUtil.dip2px(getContext(),50), DensityUtil.dip2px(getContext(),70), DensityUtil.dip2px(getContext(),90), DensityUtil.dip2px(getContext(),90),paint);*/ canvas.drawCircle(DensityUtil.dip2px(getContext(),50),DensityUtil.dip2px(getContext(),50), DensityUtil.dip2px(getContext(),40),paint); } /**\ * Measure 测量 * @param widthMeasureSpec * @param heightMeasureSpec */ @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); int widthMode = MeasureSpec.getMode(widthMeasureSpec); //widthSize是控件的宽,单位是px int widthSize = MeasureSpec.getSize(widthMeasureSpec); int heightMode = MeasureSpec.getMode(heightMeasureSpec); //widthSize是控件的高,单位是px int heightSize = MeasureSpec.getSize(heightMeasureSpec); /* widthMode == 1073741824----widthSize == 720 heightMode == -2147483648----heightSize == 1009*/ //测量的3种模式 switch (widthMode){ case MeasureSpec.AT_MOST: // 有多大占多大，一般是wrap_content break; case MeasureSpec.UNSPECIFIED: // 一般我们不怎么用，主要给系统提供了一些设置 break; case MeasureSpec.EXACTLY: // 精确值，两种情况下模式是EXACTLY， // 一个就是设置一个固定数值，另一种情况就是设置值是match_parent break; } switch (heightMode){ case MeasureSpec.AT_MOST: // 有多大占多大，一般是wrap_content break; case MeasureSpec.UNSPECIFIED:// 一般我们不怎么用，主要给系统提供了一些设置 break; case MeasureSpec.EXACTLY:// 精确值，两种情况下模式是EXACTLY， // 一个就是设置一个固定数值，另一种情况就是设置值是match_parent break; } //设置View最终的宽高 设置 测量 尺寸 setMeasuredDimension(DensityUtil.dip2px(getContext(),200),DensityUtil.dip2px(getContext(),200)); }}3. 继承VIewGroup. TextView瀑布流
xml:
<com.example.xx.day03_onlayout.MyViewGroup android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#ff0000"> <TextView android:layout_width="100dp" android:layout_height="30dp" android:background="#0f0" android:textColor="#00f" android:text="卢旷行,也不行"/> <TextView android:layout_width="130dp" android:layout_height="30dp" android:background="#0f0" android:textColor="#00f" android:text="徐蒙伸,想减肥"/> <TextView android:layout_width="160dp" android:layout_height="30dp" android:background="#0f0" android:textColor="#00f" android:text="老陈飞,特别白"/> <TextView android:layout_width="110dp" android:layout_height="30dp" android:background="#0f0" android:textColor="#00f" android:text="卢旷行,也不行"/> <TextView android:layout_width="90dp" android:layout_height="30dp" android:background="#0f0" android:textColor="#00f" android:text="徐蒙伸,想减肥"/> <TextView android:layout_width="160dp" android:layout_height="30dp" android:background="#0f0" android:textColor="#00f" android:text="老陈飞,特别白"/> <TextView android:layout_width="130dp" android:layout_height="30dp" android:background="#0f0" android:textColor="#00f" android:text="徐蒙伸,想减肥"/> <TextView android:layout_width="160dp" android:layout_height="30dp" android:background="#0f0" android:textColor="#00f" android:text="老陈飞,特别白"/> <TextView android:layout_width="110dp" android:layout_height="30dp" android:background="#0f0" android:textColor="#00f" android:text="卢旷行,也不行"/> <TextView android:layout_width="90dp" android:layout_height="30dp" android:background="#0f0" android:textColor="#00f" android:text="徐蒙伸,想减肥"/> <TextView android:layout_width="160dp" android:layout_height="30dp" android:background="#0f0" android:textColor="#00f" android:text="老陈飞,特别白"/> </com.example.xx.day03_onlayout.MyViewGroup>
自定义View类
import android.content.Context;import android.graphics.Canvas;import android.util.AttributeSet;import android.view.View;import android.view.ViewGroup;/** * 作者：戈鹏 * on 2017/11/2 22:29 */public class MyViewGroup extends ViewGroup { private int widthSize; public MyViewGroup(Context context) { super(context); } public MyViewGroup(Context context, AttributeSet attrs) { super(context, attrs); } public MyViewGroup(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); //测量子View的宽高,只有ViewGroup中有这个方法,直接继承自View没有这个方法 measureChildren(widthMeasureSpec,heightMeasureSpec); //获取ViewGrou宽 widthSize = MeasureSpec.getSize(widthMeasureSpec); } @Override protected void onLayout(boolean b, int i, int i1, int i2, int i3) { int childCount = getChildCount(); int startWidth=5; int startheight=0; for (int j = 0; j < childCount; j++) { View v = getChildAt(j); //设置位置 v.layout(startWidth,startheight,startWidth+v.getMeasuredWidth()+5,startheight+v.getMeasuredHeight()); startWidth+=v.getMeasuredWidth(); if(startWidth>=widthSize){ startWidth=0; startheight+=v.getMeasuredHeight()+10; } } }}dip转px px转dip工具类public class DensityUtil { /** * 根据手机的分辨率从 dp 的单位 转成为 px(像素) */ public static int dip2px(Context context, float dpValue) { final float scale = context.getResources().getDisplayMetrics().density; return (int) (dpValue * scale + 0.5f); } /** * 根据手机的分辨率从 px(像素) 的单位 转成为 dp */ public static int px2dip(Context context, float pxValue) { final float scale = context.getResources().getDisplayMetrics().density; return (int) (pxValue / scale + 0.5f); }}4.画一个圆形进度条
自定义属性attrs:
<?xml version="1.0" encoding="utf-8"?><resources> <declare-styleable name="RoundProgressBar"> <attr name="roundColor" format="color"/> <attr name="roundProgressColor" format="color"/> <attr name="roundWidth" format="dimension"></attr> <attr name="textColor" format="color" /> <attr name="textSize" format="dimension" /> <attr name="max" format="integer"></attr> <attr name="textIsDisplayable" format="boolean"></attr> <attr name="style"> <enum name="STROKE" value="0"></enum> <enum name="FILL" value="1"></enum> </attr> </declare-styleable></resources>
自定义View类
import android.content.Context;import android.content.res.TypedArray;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.RectF;import android.graphics.Typeface;import android.util.AttributeSet;import android.util.Log;import android.view.View;/** * 作者：戈鹏 * on 2017/11/4 09:02 */public class RoundProgressBar extends View { /** * 画笔对象的引用 */ private Paint paint; /** * 圆环的颜色 */ private int roundColor; /** * 圆环进度的颜色 */ private int roundProgressColor; /** * 中间进度百分比的字符串的颜色 */ private int textColor; /** * 中间进度百分比的字符串的字体 */ private float textSize; /** * 圆环的宽度 */ private float roundWidth; /** * 最大进度 */ private int max; /** * 当前进度 */ private int progress; /** * 是否显示中间的进度 */ private boolean textIsDisplayable; /** * 进度的风格，实心或者空心 */ private int style; public static final int STROKE = 0; public static final int FILL = 1; public RoundProgressBar(Context context) { this(context, null); } public RoundProgressBar(Context context, AttributeSet attrs) { this(context, attrs, 0); } public RoundProgressBar(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); paint = new Paint(); TypedArray mTypedArray = context.obtainStyledAttributes(attrs, R.styleable.RoundProgressBar); //获取自定义属性和默认值 roundColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundColor, Color.RED); roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN); textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.GREEN); textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 15); roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 5); max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100); textIsDisplayable = mTypedArray.getBoolean(R.styleable.RoundProgressBar_textIsDisplayable, true); style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 0); mTypedArray.recycle(); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); /** * 画最外层的大圆环 */ int centre = getWidth()/2; //获取圆心的x坐标 int radius = (int) (centre - roundWidth/2); //圆环的半径 paint.setColor(roundColor); //设置圆环的颜色 paint.setStyle(Paint.Style.STROKE); //设置空心 paint.setStrokeWidth(roundWidth); //设置圆环的宽度 paint.setAntiAlias(true); //消除锯齿 canvas.drawCircle(centre, centre, radius, paint); //画出圆环 Log.e("log", centre + ""); /** * 画进度百分比 */ paint.setStrokeWidth(0); paint.setColor(textColor); paint.setTextSize(textSize); paint.setTypeface(Typeface.DEFAULT_BOLD); //设置字体 int percent = (int)(((float)progress / (float)max) * 100); //中间的进度百分比，先转换成float在进行除法运算，不然都为0 float textWidth = paint.measureText(percent + "%"); //测量字体宽度，我们需要根据字体的宽度设置在圆环中间 //if(textIsDisplayable && percent != 0 && style == STROKE){ canvas.drawText(percent + "%", centre - textWidth / 2, centre + textSize/2, paint); //画出进度百分比 //} /** * 画圆弧 ，画圆环的进度 */ //设置进度是实心还是空心 paint.setStrokeWidth(roundWidth); //设置圆环的宽度 paint.setColor(roundProgressColor); //设置进度的颜色 RectF oval = new RectF(centre - radius, centre - radius, centre + radius, centre + radius); //用于定义的圆弧的形状和大小的界限 switch (style) { case STROKE:{ paint.setStyle(Paint.Style.STROKE); canvas.drawArc(oval, 0, 360 * progress / max, false, paint); //根据进度画圆弧 break; } case FILL:{ paint.setStyle(Paint.Style.FILL_AND_STROKE); if(progress !=0) canvas.drawArc(oval, 0, 360 * progress / max, true, paint); //根据进度画圆弧 break; } } } public synchronized int getMax() { return max; } /** * 设置进度的最大值 * @param max */ public synchronized void setMax(int max) { if(max < 0){ throw new IllegalArgumentException("max not less than 0"); } this.max = max; } /** * 获取进度.需要同步 * @return */ public synchronized int getProgress() { return progress; } /** * 设置进度，此为线程安全控件，由于考虑多线的问题，需要同步 * 刷新界面调用postInvalidate()能在非UI线程刷新 * @param progress */ public synchronized void setProgress(int progress) { if(progress < 0){ throw new IllegalArgumentException("progress not less than 0"); } if(progress > max){ progress = max; } if(progress <= max){ this.progress = progress; postInvalidate(); } } public int getCricleColor() { return roundColor; } public void setCricleColor(int cricleColor) { this.roundColor = cricleColor; } public int getCricleProgressColor() { return roundProgressColor; } public void setCricleProgressColor(int cricleProgressColor) { this.roundProgressColor = cricleProgressColor; } public int getTextColor() { return textColor; } public void setTextColor(int textColor) { this.textColor = textColor; } public float getTextSize() { return textSize; } public void setTextSize(float textSize) { this.textSize = textSize; } public float getRoundWidth() { return roundWidth; } public void setRoundWidth(float roundWidth) { this.roundWidth = roundWidth; }}xml
引用属性:
xmlns:android_custom="http://schemas.android.com/apk/res-auto"
<com.example.xx.zkmn1.RoundProgressBar android:id="@+id/rpb" android:layout_marginTop="40dp" android:layout_gravity="center" android:layout_width="180dip" android:layout_height="180dip" android:layout_marginBottom="78dp" android_custom:roundColor="#D1D1D1" android_custom:roundProgressColor="#0f0" android_custom:roundWidth="10dip" android_custom:textColor="#9A32CD" android_custom:textIsDisplayable="false" android_custom:textSize="18sp" />
改变进度Activity操作:
import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.Button;import android.widget.Toast;public class MainActivity extends AppCompatActivity implements View.OnClickListener{ private RoundProgressBar rpb; private Button btnSm; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //隐藏原有标题 getSupportActionBar().hide(); initView(); initListener(); } private void initView() { rpb = (RoundProgressBar) findViewById(R.id.rpb); btnSm = (Button) findViewById(R.id.btn_sm); } private void initListener() { btnSm.setOnClickListener(this); } Handler handler = new Handler(){ public static final int REQUEST_CODE =0 ; @Override public void handleMessage(Message msg) { if(msg.what==1){ rpb.setProgress(rpb.getProgress()+1); }else if(msg.what==2){ rpb.setProgress(0); } } }; //扫描二微码按钮点击事件 @Override public void onClick(View view) { new Thread(){ @Override public void run() { while (true){ if(rpb.getProgress()>=100){ handler.sendEmptyMessage(2); break; }else{ handler.sendEmptyMessage(1); } //每隔一秒发送一次handler try { sleep(100); } catch (InterruptedException e) { e.printStackTrace(); } } } }.start(); }}阅读全文
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