Android自定义带水滴的进度条样式（带渐变色效果）

一、直接看效果

二、直接上代码

1.自定义控件部分

package com.susan.project.myapplication;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Shader;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
/**
* @author dahai
* @ClassName: ${type_name}
* @Description: ${todo}
* @date ${date} ${time}
* @email 202491024@qq.com
* @since $

• android




• 渐变




• 进度条





• */




• public class ProgressSeek extends View {




• /**




• * 进度条的宽度




• */




• private int view_width;




• /**




• * 画布的宽度




• */




• private int view_base_width;




• /**




• * 控件的宽度




• */




• private int view_edge_width;




• /**




• * 进度




• */




• private int progress;




• private Canvas cacheCanvas;




• /**




• * 背景颜色的画笔




• */




• private Paint backgroundPaint;




• /**




• * 进度条的画笔




• */




• private Paint progressPaint;




• /**




• * 进度末端的图




• */




• private Bitmap bitmap;




• private int bitmapWidth;




• private int bitmapHeight;




• private Context context;




• //渐变色开始




• private static final int DEFAULT_START_COLOR = Color.parseColor("#34DAB5");




• //渐变色结束




• private static final int DEFAULT_END_COLOR = Color.parseColor("#27A5FE");




• /**




• * 缓存图片




• */




• private Bitmap cacheBitmap;




• public ProgressSeek(Context context) {




• super(context);




• initView(context);




• }




• public ProgressSeek(Context context, AttributeSet attrs) {




• super(context, attrs);




• initView(context);




• }




• public ProgressSeek(Context context, AttributeSet attrs, int defStyleAttr) {




• super(context, attrs, defStyleAttr);




• initView(context);




• }




• private void initView(Context context) {




• this.context = context;




• bitmap = BitmapFactory.decodeResource(context.getResources(), R.mipmap.thumb);




• bitmapWidth = bitmap.getWidth();




• bitmapHeight = bitmap.getHeight();




• backgroundPaint = new Paint();




• backgroundPaint.setStrokeWidth(bitmapWidth);




• backgroundPaint.setColor(Color.parseColor("#cccccc"));




• backgroundPaint.setDither(true);




• backgroundPaint.setAntiAlias(true);




• progressPaint = new Paint();




• progressPaint.setStrokeWidth(bitmapWidth);




• progressPaint.setDither(true);




• progressPaint.setAntiAlias(true);




• DisplayMetrics d = new DisplayMetrics();




• ((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(d);




• view_base_width = d.widthPixels;




• }




• public void init(int progress) {




• this.progress = progress;




• if (view_width == 0) {//第一上来




• /* DisplayMetrics d = new DisplayMetrics();




• ((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(d);




• view_width = d.widthPixels*progress/100;*/




• view_width = view_base_width * progress / 100;




• } else {




• view_width = view_edge_width * progress / 100;




• }




• if (cacheBitmap != null) {




• if (!cacheBitmap.isRecycled()) {




• cacheBitmap.recycle();




• cacheBitmap = null;




• }




• cacheCanvas = null;




• }




• cacheBitmap = Bitmap.createBitmap(view_base_width, bitmapHeight * 2, Bitmap.Config.ARGB_8888);




• if (cacheCanvas == null) {




• cacheCanvas = new Canvas();




• cacheCanvas.setBitmap(cacheBitmap);




• }




• /**




• * 画背景




• */




• RectF r = new RectF();




• r.left = 0;




• r.top = bitmapHeight;




• r.right = view_base_width;




• r.bottom = bitmapWidth + 10;




• cacheCanvas.drawRoundRect(r, 5f, 5f, backgroundPaint);




• if (progress > 0) {




• LinearGradient lg = new LinearGradient(0, 0, view_width, bitmapWidth, DEFAULT_START_COLOR, DEFAULT_END_COLOR, Shader.TileMode.CLAMP);




• progressPaint.setShader(lg);




• RectF r1 = new RectF();




• r.left = 0;




• r.top = bitmapHeight;




• r.right = view_width;




• r.bottom = bitmapWidth + 10;




• cacheCanvas.drawRoundRect(r, 5f, 5f, progressPaint);




• cacheCanvas.drawBitmap(bitmap, view_width - bitmapWidth+8, bitmapHeight / 2 + 6, new Paint());




• }




• invalidate();




• }




• @Override




• protected void onDraw(Canvas canvas) {




• super.onDraw(canvas);




• Paint bmpPaint = new Paint();




• //将cacheBitmap绘制到该View组件




• if (cacheBitmap != null) {




• canvas.drawBitmap(cacheBitmap, 0, 0, bmpPaint);




• }




• view_edge_width = this.getWidth();




• Log.e("打出来看看控件的宽度:", view_edge_width + "");




• init(progress);




• }




• }

3. 布局文件部分

<?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="vertical">
<com.susan.project.myapplication.ProgressSeek
android:id="@+id/progress"
android:layout_width="match_parent"
android:layout_height="80dp">
</com.susan.project.myapplication.ProgressSeek>
<com.susan.project.myapplication.ProgressSeek
android:id="@+id/progress1"
android:layout_width="match_parent"
android:layout_height="80dp">
</com.susan.project.myapplication.ProgressSeek>
<com.susan.project.myapplication.ProgressSeek
android:id="@+id/progress2"
android:layout_width="match_parent"
android:layout_height="80dp">
</com.susan.project.myapplication.ProgressSeek>
<com.susan.project.myapplication.ProgressSeek
android:id="@+id/progress3"
android:layout_width="match_parent"
android:layout_height="80dp">
</com.susan.project.myapplication.ProgressSeek>
</LinearLayout>

4.Activity部分

package com.susan.project.myapplication;
import android.app.Activity;
import android.os.Bundle;
public class MainActivity extends Activity {
private ProgressSeek progress;
private ProgressSeek progress1;
private ProgressSeek progress2;
private ProgressSeek progress3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
progress = (ProgressSeek) findViewById(R.id.progress);
progress.init(0);
progress1 = (ProgressSeek) findViewById(R.id.progress1);
progress1.init(2);
progress2 = (ProgressSeek) findViewById(R.id.progress2);
progress2.init(50);
progress3 = (ProgressSeek) findViewById(R.id.progress3);
progress3.init(100);
}
}

以上所述是小编给大家介绍的Android自定义带水滴的进度条样式（带渐变色效果）网站的支持！

来源：http://blog.csdn.net/susan8888/article/details/53506736