我正在寻找在Android中实现“状态”进度条的平滑方法，就像下面的三个示例所示。
由于我不喜欢重复造轮子，所以想问一下是否有我不知道的库可用。
我查找了并没有找到任何库，所以我猜我需要自己实现它。最简单的解决方案是什么？我应该扩展ProgressBar还是从头开始？您有任何建议或教程可以帮助我吗？
图片链接见上文。
我查找了并没有找到任何库，所以我猜我需要自己实现它。最简单的解决方案是什么？我应该扩展ProgressBar还是从头开始？您有任何建议或教程可以帮助我吗？
图片链接见上文。
安卓进度条状态
8
- Frame91
1
请查看此处：https://dev59.com/yG3Xa4cB1Zd3GeqPf4tj。这是一个可分段的SeekBar，但您可以轻松地禁止用户更改SeekBar的值。您还需要更改样式，但底层库是开源且灵活的：https://github.com/karabaralex/android-comboseekbar - kha
2个回答
12
更新
请查看此示例项目，同时附有GIF以提供概述。
您可以根据需要自定义以下内容。
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.os.Bundle;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.view.View;
public class NumberProgressBar extends View {
private Context mContext;
/**
* The max progress, default is 100
*/
private int mMax = 100;
/**
* current progress, can not exceed the max progress.
*/
private int mProgress = 0;
/**
* the progress area bar color
*/
private int mReachedBarColor;
/**
* the bar unreached area color.
*/
private int mUnreachedBarColor;
/**
* the progress text color.
*/
private int mTextColor;
/**
* the progress text size
*/
private float mTextSize;
/**
* the height of the reached area
*/
private float mReachedBarHeight;
/**
* the height of the unreached area
*/
private float mUnreachedBarHeight;
/**
* the suffix of the number.
*/
private String mSuffix = "%";
/**
* the prefix.
*/
private String mPrefix = "";
private final int default_text_color = Color.rgb(66, 145, 241);
private final int default_reached_color = Color.rgb(66,145,241);
private final int default_unreached_color = Color.rgb(204, 204, 204);
private final float default_progress_text_offset;
private final float default_text_size;
private final float default_reached_bar_height;
private final float default_unreached_bar_height;
/**
* for save and restore instance of progressbar.
*/
private static final String INSTANCE_STATE = "saved_instance";
private static final String INSTANCE_TEXT_COLOR = "text_color";
private static final String INSTANCE_TEXT_SIZE = "text_size";
private static final String INSTANCE_REACHED_BAR_HEIGHT = "reached_bar_height";
private static final String INSTANCE_REACHED_BAR_COLOR = "reached_bar_color";
private static final String INSTANCE_UNREACHED_BAR_HEIGHT = "unreached_bar_height";
private static final String INSTANCE_UNREACHED_BAR_COLOR = "unreached_bar_color";
private static final String INSTANCE_MAX = "max";
private static final String INSTANCE_PROGRESS = "progress";
private static final String INSTANCE_SUFFIX = "suffix";
private static final String INSTANCE_PREFIX = "prefix";
private static final String INSTANCE_TEXT_VISBILITY = "text_visibility";
private static final int PROGRESS_TEXT_VISIBLE = 0;
private static final int PROGRESS_TEXT_INVISIBLE = 1;
/**
* the width of the text that to be drawn
*/
private float mDrawTextWidth;
/**
* the drawn text start
*/
private float mDrawTextStart;
/**
*the drawn text end
*/
private float mDrawTextEnd;
/**
* the text that to be drawn in onDraw()
*/
private String mCurrentDrawText;
/**
* the Paint of the reached area.
*/
private Paint mReachedBarPaint;
/**
* the Painter of the unreached area.
*/
private Paint mUnreachedBarPaint;
/**
* the Painter of the progress text.
*/
private Paint mTextPaint;
/**
* Unreached Bar area to draw rect.
*/
private RectF mUnreachedRectF = new RectF(0,0,0,0);
/**
* reached bar area rect.
*/
private RectF mReachedRectF = new RectF(0,0,0,0);
/**
* the progress text offset.
*/
private float mOffset;
/**
* determine if need to draw unreached area
*/
private boolean mDrawUnreachedBar = true;
private boolean mDrawReachedBar = true;
private boolean mIfDrawText = true;
public enum ProgressTextVisibility{
Visible,Invisible
};
public NumberProgressBar(Context context) {
this(context, null);
}
public NumberProgressBar(Context context, AttributeSet attrs) {
this(context, attrs, R.attr.numberProgressBarStyle);
}
public NumberProgressBar(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mContext = context;
default_reached_bar_height = dp2px(1.5f);
default_unreached_bar_height = dp2px(1.0f);
default_text_size = sp2px(10);
default_progress_text_offset = dp2px(3.0f);
//load styled attributes.
final TypedArray attributes = context.getTheme().obtainStyledAttributes(attrs, R.styleable.NumberProgressBar,
defStyleAttr, 0);
mReachedBarColor = attributes.getColor(R.styleable.NumberProgressBar_progress_reached_color, default_reached_color);
mUnreachedBarColor = attributes.getColor(R.styleable.NumberProgressBar_progress_unreached_color,default_unreached_color);
mTextColor = attributes.getColor(R.styleable.NumberProgressBar_progress_text_color,default_text_color);
mTextSize = attributes.getDimension(R.styleable.NumberProgressBar_progress_text_size, default_text_size);
mReachedBarHeight = attributes.getDimension(R.styleable.NumberProgressBar_progress_reached_bar_height,default_reached_bar_height);
mUnreachedBarHeight = attributes.getDimension(R.styleable.NumberProgressBar_progress_unreached_bar_height,default_unreached_bar_height);
mOffset = attributes.getDimension(R.styleable.NumberProgressBar_progress_text_offset,default_progress_text_offset);
int textVisible = attributes.getInt(R.styleable.NumberProgressBar_progress_text_visibility,PROGRESS_TEXT_VISIBLE);
if(textVisible != PROGRESS_TEXT_VISIBLE){
mIfDrawText = false;
}
setProgress(attributes.getInt(R.styleable.NumberProgressBar_progress,0));
setMax(attributes.getInt(R.styleable.NumberProgressBar_max, 100));
//
attributes.recycle();
initializePainters();
}
@Override
protected int getSuggestedMinimumWidth() {
return (int)mTextSize;
}
@Override
protected int getSuggestedMinimumHeight() {
return Math.max((int)mTextSize,Math.max((int)mReachedBarHeight,(int)mUnreachedBarHeight));
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
setMeasuredDimension(measure(widthMeasureSpec,true), measure(heightMeasureSpec,false));
}
private int measure(int measureSpec,boolean isWidth){
int result;
int mode = MeasureSpec.getMode(measureSpec);
int size = MeasureSpec.getSize(measureSpec);
int padding = isWidth?getPaddingLeft()+getPaddingRight():getPaddingTop()+getPaddingBottom();
if(mode == MeasureSpec.EXACTLY){
result = size;
}else{
result = isWidth ? getSuggestedMinimumWidth() : getSuggestedMinimumHeight();
result += padding;
if(mode == MeasureSpec.AT_MOST){
if(isWidth) {
result = Math.max(result, size);
}
else{
result = Math.min(result, size);
}
}
}
return result;
}
@Override
protected void onDraw(Canvas canvas) {
if(mIfDrawText){
calculateDrawRectF();
}else{
calculateDrawRectFWithoutProgressText();
}
if(mDrawReachedBar){
canvas.drawRect(mReachedRectF,mReachedBarPaint);
}
if(mDrawUnreachedBar) {
canvas.drawRect(mUnreachedRectF, mUnreachedBarPaint);
}
if(mIfDrawText)
canvas.drawText(mCurrentDrawText,mDrawTextStart,mDrawTextEnd,mTextPaint);
}
private void initializePainters(){
mReachedBarPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mReachedBarPaint.setColor(mReachedBarColor);
mUnreachedBarPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mUnreachedBarPaint.setColor(mUnreachedBarColor);
mTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mTextPaint.setColor(mTextColor);
mTextPaint.setTextSize(mTextSize);
}
private void calculateDrawRectFWithoutProgressText(){
mReachedRectF.left = getPaddingLeft();
mReachedRectF.top = getHeight()/2.0f - mReachedBarHeight / 2.0f;
mReachedRectF.right = (getWidth() - getPaddingLeft() - getPaddingRight() )/(getMax()*1.0f) * getProgress() + getPaddingLeft();
mReachedRectF.bottom = getHeight()/2.0f + mReachedBarHeight / 2.0f;
mUnreachedRectF.left = mReachedRectF.right;
mUnreachedRectF.right = getWidth() - getPaddingRight();
mUnreachedRectF.top = getHeight()/2.0f + - mUnreachedBarHeight / 2.0f;
mUnreachedRectF.bottom = getHeight()/2.0f + mUnreachedBarHeight / 2.0f;
}
private void calculateDrawRectF(){
mCurrentDrawText = String.format("%d" ,getProgress()*100/getMax());
mCurrentDrawText = mPrefix + mCurrentDrawText + mSuffix;
mDrawTextWidth = mTextPaint.measureText(mCurrentDrawText);
if(getProgress() == 0){
mDrawReachedBar = false;
mDrawTextStart = getPaddingLeft();
}else{
mDrawReachedBar = true;
mReachedRectF.left = getPaddingLeft();
mReachedRectF.top = getHeight()/2.0f - mReachedBarHeight / 2.0f;
mReachedRectF.right = (getWidth() - getPaddingLeft() - getPaddingRight() )/(getMax()*1.0f) * getProgress() - mOffset + getPaddingLeft();
mReachedRectF.bottom = getHeight()/2.0f + mReachedBarHeight / 2.0f;
mDrawTextStart = (mReachedRectF.right + mOffset);
}
mDrawTextEnd = (int) ((getHeight() / 2.0f) - ((mTextPaint.descent() + mTextPaint.ascent()) / 2.0f)) ;
if((mDrawTextStart + mDrawTextWidth )>= getWidth() - getPaddingRight()){
mDrawTextStart = getWidth() - getPaddingRight() - mDrawTextWidth;
mReachedRectF.right = mDrawTextStart - mOffset;
}
float unreachedBarStart = mDrawTextStart + mDrawTextWidth + mOffset;
if(unreachedBarStart >= getWidth() - getPaddingRight()){
mDrawUnreachedBar = false;
}else{
mDrawUnreachedBar = true;
mUnreachedRectF.left = unreachedBarStart;
mUnreachedRectF.right = getWidth() - getPaddingRight();
mUnreachedRectF.top = getHeight()/2.0f + - mUnreachedBarHeight / 2.0f;
mUnreachedRectF.bottom = getHeight()/2.0f + mUnreachedBarHeight / 2.0f;
}
}
/**
* get progress text color
* @return progress text color
*/
public int getTextColor() {
return mTextColor;
}
/**
* get progress text size
* @return progress text size
*/
public float getProgressTextSize() {
return mTextSize;
}
public int getUnreachedBarColor() {
return mUnreachedBarColor;
}
public int getReachedBarColor() {
return mReachedBarColor;
}
public int getProgress() {
return mProgress;
}
public int getMax() {
return mMax;
}
public float getReachedBarHeight(){
return mReachedBarHeight;
}
public float getUnreachedBarHeight(){
return mUnreachedBarHeight;
}
public void setProgressTextSize(float TextSize) {
this.mTextSize = TextSize;
mTextPaint.setTextSize(mTextSize);
invalidate();
}
public void setProgressTextColor(int TextColor) {
this.mTextColor = TextColor;
mTextPaint.setColor(mTextColor);
invalidate();
}
public void setUnreachedBarColor(int BarColor) {
this.mUnreachedBarColor = BarColor;
mUnreachedBarPaint.setColor(mReachedBarColor);
invalidate();
}
public void setReachedBarColor(int ProgressColor) {
this.mReachedBarColor = ProgressColor;
mReachedBarPaint.setColor(mReachedBarColor);
invalidate();
}
public void setReachedBarHeight(float height){
mReachedBarHeight = height;
}
public void setUnreachedBarHeight(float height){
mUnreachedBarHeight = height;
}
public void setMax(int Max) {
if(Max > 0){
this.mMax = Max;
invalidate();
}
}
public void setSuffix(String suffix){
if(suffix == null){
mSuffix = "";
}else{
mSuffix = suffix;
}
}
public String getSuffix(){
return mSuffix;
}
public void setPrefix(String prefix){
if(prefix == null)
mPrefix = "";
else{
mPrefix = prefix;
}
}
public String getPrefix(){
return mPrefix;
}
public void incrementProgressBy(int by){
if(by > 0){
setProgress(getProgress() + by);
}
}
public void setProgress(int Progress) {
if(Progress <= getMax() && Progress >= 0){
this.mProgress = Progress;
invalidate();
}
}
@Override
protected Parcelable onSaveInstanceState() {
final Bundle bundle = new Bundle();
bundle.putParcelable(INSTANCE_STATE,super.onSaveInstanceState());
bundle.putInt(INSTANCE_TEXT_COLOR,getTextColor());
bundle.putFloat(INSTANCE_TEXT_SIZE, getProgressTextSize());
bundle.putFloat(INSTANCE_REACHED_BAR_HEIGHT,getReachedBarHeight());
bundle.putFloat(INSTANCE_UNREACHED_BAR_HEIGHT,getUnreachedBarHeight());
bundle.putInt(INSTANCE_REACHED_BAR_COLOR,getReachedBarColor());
bundle.putInt(INSTANCE_UNREACHED_BAR_COLOR,getUnreachedBarColor());
bundle.putInt(INSTANCE_MAX,getMax());
bundle.putInt(INSTANCE_PROGRESS,getProgress());
bundle.putString(INSTANCE_SUFFIX,getSuffix());
bundle.putString(INSTANCE_PREFIX,getPrefix());
bundle.putBoolean(INSTANCE_TEXT_VISBILITY, getProgressTextVisibility());
return bundle;
}
@Override
protected void onRestoreInstanceState(Parcelable state) {
if(state instanceof Bundle){
final Bundle bundle = (Bundle)state;
mTextColor = bundle.getInt(INSTANCE_TEXT_COLOR);
mTextSize = bundle.getFloat(INSTANCE_TEXT_SIZE);
mReachedBarHeight = bundle.getFloat(INSTANCE_REACHED_BAR_HEIGHT);
mUnreachedBarHeight = bundle.getFloat(INSTANCE_UNREACHED_BAR_HEIGHT);
mReachedBarColor = bundle.getInt(INSTANCE_REACHED_BAR_COLOR);
mUnreachedBarColor = bundle.getInt(INSTANCE_UNREACHED_BAR_COLOR);
initializePainters();
setMax(bundle.getInt(INSTANCE_MAX));
setProgress(bundle.getInt(INSTANCE_PROGRESS));
setPrefix(bundle.getString(INSTANCE_PREFIX));
setSuffix(bundle.getString(INSTANCE_SUFFIX));
setProgressTextVisibility(bundle.getBoolean(INSTANCE_TEXT_VISBILITY) ? ProgressTextVisibility.Visible : ProgressTextVisibility.Invisible);
super.onRestoreInstanceState(bundle.getParcelable(INSTANCE_STATE));
return;
}
super.onRestoreInstanceState(state);
}
public float dp2px(float dp) {
final float scale = getResources().getDisplayMetrics().density;
return dp * scale + 0.5f;
}
public float sp2px(float sp){
final float scale = getResources().getDisplayMetrics().scaledDensity;
return sp * scale;
}
public void setProgressTextVisibility(ProgressTextVisibility visibility){
mIfDrawText = visibility == ProgressTextVisibility.Visible;
invalidate();
}
public boolean getProgressTextVisibility() {
return mIfDrawText;
}
}
您还可以使用线性布局进行操作。我已经做了一个简单的示例，只是个简单的示例。
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="@+id/ll_progress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:background="@drawable/layout" >
<ImageView
android:id="@+id/ImageView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="14dp"
android:src="@drawable/bg_1" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="38dp"
android:layout_marginTop="14dp"
android:src="@drawable/bg_1" />
<ImageView
android:id="@+id/imageView12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="35dp"
android:layout_marginTop="14dp"
android:src="@drawable/bg_1" />
</LinearLayout>
</RelativeLayout>
MainActivity.java
import java.util.concurrent.TimeUnit;
import android.app.Activity;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.TransitionDrawable;
import android.os.Bundle;
import android.os.Handler;
import android.widget.ImageView;
import android.widget.LinearLayout;
public class MainActivity extends Activity {
LinearLayout llProgress;
Handler handler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
llProgress = (LinearLayout) findViewById(R.id.ll_progress);
handler = new Handler(getMainLooper());
startTransition();
}
int prevChild = 0;
private void startTransition() {
// create the transition layers
Drawable[] layers = new Drawable[2];
layers[0] = new BitmapDrawable(getResources(), BitmapFactory.decodeResource(getResources(), R.drawable.bg));
layers[1] = new BitmapDrawable(getResources(), BitmapFactory.decodeResource(getResources(), R.drawable.bg_1));
final TransitionDrawable[] transitionDrawable = new TransitionDrawable[llProgress.getChildCount()];
for (int i = 0; i < llProgress.getChildCount(); i++) {
transitionDrawable[i] = new TransitionDrawable(layers);
((ImageView) llProgress.getChildAt(i)).setImageDrawable(transitionDrawable[i]);
}
handler.postDelayed(new Runnable() {
@Override
public void run() {
transitionDrawable[prevChild++].startTransition(1000);
if(prevChild > llProgress.getChildCount() - 1){
prevChild = 0;
}
handler.postDelayed(this, 1000 * 3);
}
}, 1000 * 3);
}
- AZ_
-1
ProgressBar小部件通过在分配的进度Drawable上设置适当的级别，委派其进度的绘制。默认情况下*，进度Drawable是一个包含三个图层的layer-list**：背景、进度和次要进度。最后两个都被包裹在clip或scale容器中，根据它们的级别自动剪切或缩放到它们的百分比。它们也被指定了特殊的ID，如果Drawable恰好是一个layer-list，则ProgressBar将搜索和处理它们，而不是整个Drawable。
在您的情况下，由于进度增量并不相等，您可以使用level-list drawable容器作为您的进度层，并为所有进度增量提供资产。或者，如果您希望使其具有动态性，您可以创建具有基于其级别的适当绘图逻辑的自定义Drawable子类。
这是一个使用level-list的进度Drawable资源的示例XML：
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@android:id/background"
android:drawable="@drawable/progress_bg" />
<item android:id="@android:id/progress">
<level-list>
<item android:drawable="@android:color/transparent" />
<item android:drawable="@drawable/progress_1" />
<item android:drawable="@drawable/progress_2" />
<item android:drawable="@drawable/progress_3" />
</level-list>
</item>
</layer-list>
*您可以在这里找到原始的非Holo版本，Holo版本在这里和在这里。
**您可以在这里找到可在XML中定义的标准框架Drawable列表。
- corsair992
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