使用WindowManager进行progress提示

最新推荐文章于 2021-10-07 09:18:16 发布

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最新推荐文章于 2021-10-07 09:18:16 发布

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本文链接：https://blog.youkuaiyun.com/Hknock/article/details/7828140

本文详细介绍了如何实现并绘制一个自定义的进度条标题栏，包括其核心组件、关键方法以及如何设置其在系统窗口中的显示位置和透明度。

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package login;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.view.Gravity;
import android.view.View;
import android.view.WindowManager;

import fusion.FusionField;

/**
 * 
 * <一句话功能简述>
 * 
 * @author  0000005487
 * @version  [版本号, 2012-8-3]
 * @see  [相关类/方法]
 * @since  [产品/模块版本]
 */
public class ProgressTitleBar extends View
{
    private Context mContext;
    
    private Paint mPaint;
    
    private WindowManager mWindowManager;
    
    private String mText;
    
    private int mWidth;
    
    private int mHeight;
    
    private int curCount;
    
    private int totalCount;
    
    private int progressValue;
    
    public ProgressTitleBar(Context context)
    {
        super(context);
        this.mContext = context;
        mWindowManager = (WindowManager)mContext.getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
        mPaint = new Paint();
    }
    
    public void addToWindow()
    {
        WindowManager.LayoutParams params = new WindowManager.LayoutParams();
                params.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT | WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY;
//        params.type = WindowManager.LayoutParams.FIRST_SUB_WINDOW;
        params.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
        
        params.width = FusionField.screenWidth != 0 ? FusionField.screenWidth : 1280;
        params.height = 20;
        params.alpha = 0.6f;
        
        params.gravity = Gravity.LEFT | Gravity.BOTTOM;
        //以屏幕左上角为原点，设置x、y初始值   
        params.x = 0;
        params.y = mHeight;
        mWindowManager.addView(this, params);
    }
    
    public void removeView()
    {
        mWindowManager.removeView(this);
    }
    
    @Override
    protected void onDraw(Canvas canvas)
    {
        super.onDraw(canvas);
        if (totalCount > 0)
        {
            canvas.drawColor(0x88000000);
            if (progressValue > 0 && progressValue <= 100)
            {
                mPaint.setColor(0x8800FF00);
                canvas.drawRect(0, 0, mWidth * (progressValue / 100f), mHeight, mPaint);
            }
            mPaint.setColor(0xFFFFFFFF);
            
            mPaint.measureText(mText);
            canvas.drawText(mText, (mWidth - mPaint.measureText(mText)) / 2, 18, mPaint);
        }
    }
    
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
    {
        mWidth = FusionField.screenWidth != 0 ? FusionField.screenWidth : 1280;
        mHeight = 20;
        setMeasuredDimension(mWidth, mHeight);
    }
    
    public void setProgress(int cCount, int tCount, int pValue)
    {
        this.curCount = cCount < 0 ? 0 : cCount;
        this.totalCount = tCount > curCount ? curCount : tCount;
        
        mText = new StringBuffer("正在上传录像").append(curCount).append("/").append(totalCount).toString();
        
        this.progressValue = pValue < 0 ? 0 : pValue > 100 ? 100 : pValue;
        this.invalidate();
    }
    
}