自定义Progress小控件

progress各种各样的都有，自定义大多数也是简单的，根据业务需求来自己定义，记录一下，先上效果图

本来想找个第三方改改就上的，不过自己的业务需求有点不搭，一下子没找到合适的，也没这么多时间去找了，想想还是自己写个吧，因为也简单

主要就是需求就是椭圆进度，百分比跟随渐变背景，这样一想其实就是一个布局，然后控制里面的进度长度，或者移动，我这是控制长度，这样毕竟简单，而且扩展好，以后进度条有什么奇葩需求也好改

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Color;
import android.support.annotation.AttrRes;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.TextView;

import com.app.commonlibrary.R;

/**
 * Created by LiuZhen on 2017/7/8.
 */

public class UpdateProgressBar extends FrameLayout {

    private TextView tv_progress;
    private int width;
    private ViewGroup.LayoutParams params;
    /**
     * The progress text offset.
     */
    private int mOffset;
    /**
     * The progress text size.
     */
    private float mTextSize;
    /**
     * The progress text color.
     */
    private int mTextColor;
    private float default_text_size;
    /**
     * The progress area bar color.
     */
    private int mReachedBarColor;
    /**
     * The bar unreached area color.
     */
    private int mUnreachedBarColor;
    private final int default_reached_color = Color.rgb(66, 145, 241);
    private final int default_unreached_color = Color.rgb(204, 204, 204);
    private final int default_text_color = Color.rgb(66, 145, 241);

    public UpdateProgressBar(@NonNull Context context) {
        this(context,null);
    }

    public UpdateProgressBar(@NonNull Context context, @Nullable AttributeSet attrs) {
        this(context, attrs,0);
    }

    public UpdateProgressBar(@NonNull Context context, @Nullable AttributeSet attrs, @AttrRes int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(attrs, defStyleAttr);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        int desiredWidth = 100;
        int desiredHeight = 100;

        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
        int heightSize = MeasureSpec.getSize(heightMeasureSpec);

        int height;

        //Measure Width
        if (widthMode == MeasureSpec.EXACTLY) {
            //Must be this size
            width = widthSize;
        } else if (widthMode == MeasureSpec.AT_MOST) {
            //Can't be bigger than...
            width = Math.min(desiredWidth, widthSize);
        } else {
            //Be whatever you want
            width = desiredWidth;
        }

        //Measure Height
        if (heightMode == MeasureSpec.EXACTLY) {
            //Must be this size
            height = heightSize;
        } else if (heightMode == MeasureSpec.AT_MOST) {
            //Can't be bigger than...
            height = Math.min(desiredHeight, heightSize);
        } else {
            //Be whatever you want
            height = desiredHeight;
        }

        int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            ViewGroup.LayoutParams lp = child.getLayoutParams();
            int childWidthSpec = getChildMeasureSpec(widthMeasureSpec, 0, lp.width);
            int childHeightSpec = getChildMeasureSpec(heightMeasureSpec, 0, lp.height);
            child.measure(childWidthSpec, childHeightSpec);
        }
        params = tv_progress.getLayoutParams();
        params.width = ViewGroup.LayoutParams.WRAP_CONTENT;
        params.height = ViewGroup.LayoutParams.MATCH_PARENT;
        tv_progress.setLayoutParams(params);
        height = tv_progress.getMeasuredHeight();
        //MUST CALL THIS
        setMeasuredDimension(width, height);
    }


    private void init(AttributeSet attrs, int defStyleAttr){

        default_text_size = 8;
        //load styled attributes.
        final TypedArray attributes = getContext().getTheme().obtainStyledAttributes(attrs, R.styleable.UpdateProgressBar,
                defStyleAttr, 0);

        mTextSize = attributes.getDimension(R.styleable.UpdateProgressBar_update_text_size, default_text_size);
        mReachedBarColor = attributes.getResourceId(R.styleable.UpdateProgressBar_update_reached_color, default_reached_color);
        mUnreachedBarColor = attributes.getResourceId(R.styleable.UpdateProgressBar_update_unreached_color, default_unreached_color);
        mTextColor = attributes.getColor(R.styleable.UpdateProgressBar_update_text_color, default_text_color);

        setDefaultProgressBar();

        mOffset = px2dip(3);

        attributes.recycle();
    }

    private void setDefaultProgressBar(){
        setBackgroundResource(mUnreachedBarColor);
        tv_progress = new TextView(getContext());
        tv_progress.setTextSize(mTextSize);
        tv_progress.setGravity(Gravity.RIGHT | Gravity.CENTER_VERTICAL);
        tv_progress.setTextColor(mTextColor);
        tv_progress.setLines(1);
        tv_progress.setBackgroundResource(mReachedBarColor);
        tv_progress.setPadding(dip2px(4),0,dip2px(8),0);
        tv_progress.setText("0 %");
        addView(tv_progress);
    }

    public void setProgress(int progress){
        tv_progress.setText(progress+"%");
        int proWidth = width*progress/100;
        if (tv_progress.getMeasuredWidth() < proWidth) {
            //这里不能填充mOffset，因为是椭圆进度条，填充会导致椭圆宽度被进度条覆盖，导致不美观
//            tv_progress.setLayoutParams(params);
            tv_progress.setWidth(proWidth);
        }
    }

    /**
     * 根据手机的分辨率从 dp 的单位 转成为 px(像素)
     */
    public int dip2px(float dpValue) {
        final float scale = getContext().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 int px2dip(float pxValue) {
        final float scale = getContext().getResources().getDisplayMetrics().density;
        return (int) (pxValue / scale + 0.5f);
    }

    /**
     * 将px值转换为sp值，保证文字大小不变
     */
    public int px2sp(float pxValue) {
        final float fontScale = getContext().getResources().getDisplayMetrics().scaledDensity;
        return (int) (pxValue / fontScale + 0.5f);
    }

    /**
     * 将sp值转换为px值，保证文字大小不变
     */
    public int sp2px(float spValue) {
        final float fontScale = getContext().getResources().getDisplayMetrics().scaledDensity;
        return (int) (spValue * fontScale + 0.5f);
    }

}

用法布局文件

<com.progressbar.example.UpdateProgressBar
        xmlns:pro="http://schemas.android.com/apk/res-auto"
        android:id="@+id/progress"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        pro:update_text_size="6sp"
        pro:update_text_color="#FFFFFF"
        pro:update_unreached_color="@drawable/shape_corner_progressbg"
        pro:update_reached_color="@drawable/shape_corner_progressbar"/>

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

import com.progressbar.NumberProgressBar;

import java.util.Timer;
import java.util.TimerTask;


public class MainActivity extends AppCompatActivity {
    private Timer timer;
    private UpdateProgressBar progressBar;
    private int progress;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        progressBar = (UpdateProgressBar)findViewById(R.id.progress);

        timer = new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        progress++;
                        progressBar.setProgress(progress);
                        if(progress == 100) {
                            Toast.makeText(getApplicationContext(), getString(R.string.finish), Toast.LENGTH_SHORT).show();
//                            progress = 0;
//                            progressBar.setProgress(0);
                            timer.cancel();
                        }
                    }
                });
            }
        }, 1000, 100);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        timer.cancel();
    }
}

渐变背景

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">

    <solid android:color="#4984f2"/>

    <gradient
        android:startColor="#4984f2"
        android:endColor="#000" />

    <corners
        android:topLeftRadius="15dp"
        android:topRightRadius="15dp"
        android:bottomLeftRadius="15dp"
        android:bottomRightRadius="15dp"/>
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">

    <solid android:color="#dadada"/>

    <gradient
    android:startColor="#FFF"
    android:endColor="#000" />


    <corners
        android:topLeftRadius="15dp"
        android:topRightRadius="15dp"
        android:bottomLeftRadius="15dp"
        android:bottomRightRadius="15dp"/>
</shape>