Android自訂帶水滴的進度條樣式（帶漸層色效果）_Android

一、直接看效果

二、直接上代碼

1.自訂控制項部分

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 漸層 進度條 */public class ProgressSeek extends View {/*** 進度條的寬度*/private int view_width;/*** 畫布的寬度*/private int view_base_width;/*** 控制項的寬度*/private int view_edge_width;/*** 進度*/private int progress;private Canvas cacheCanvas;/*** 背景顏色的畫筆*/private Paint backgroundPaint;/*** 進度條的畫筆*/private Paint progressPaint;/*** 進度末端的圖*/private Bitmap bitmap;private int bitmapWidth;private int bitmapHeight;private Context context;//漸層色開始private static final int DEFAULT_START_COLOR = Color.parseColor("#34DAB5");//漸層色結束private static final int DEFAULT_END_COLOR = Color.parseColor("#27A5FE");/*** 緩衝圖片*/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) {//第一上來/* 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);}/*** 畫背景*/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();}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);Paint bmpPaint = new Paint();//將cacheBitmap繪製到該View組件if (cacheBitmap != null) {canvas.drawBitmap(cacheBitmap, 0, 0, bmpPaint);}view_edge_width = this.getWidth();Log.e("打出來看看控制項的寬度:", view_edge_width + "");init(progress);}}

3. 布局檔案部分

<?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.ProgressSeekandroid:id="@+id/progress"android:layout_width="match_parent"android:layout_height="80dp"></com.susan.project.myapplication.ProgressSeek><com.susan.project.myapplication.ProgressSeekandroid:id="@+id/progress1"android:layout_width="match_parent"android:layout_height="80dp"></com.susan.project.myapplication.ProgressSeek><com.susan.project.myapplication.ProgressSeekandroid:id="@+id/progress2"android:layout_width="match_parent"android:layout_height="80dp"></com.susan.project.myapplication.ProgressSeek><com.susan.project.myapplication.ProgressSeekandroid: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;@Overrideprotected 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);}}

以上所述是小編給大家介紹的Android自訂帶水滴的進度條樣式（帶漸層色效果），希望對大家有所協助，如果大家有任何疑問請給我留言，小編會及時回複大家的。在此也非常感謝大家對雲棲社區網站的支援！