竖直进度条的实现方法

VerticalProgressBar.java: import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Rect; import android.util.AttributeSet; import android.util.Log; import android.view.View; public class VerticalProgressBar extends View { private Paint paint;    // 画笔 private int progress;   // 进度值 private int width;      // 宽度值 private int height;     // 高度值 public VerticalProgressBar(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(); } public VerticalProgressBar(Context context, AttributeSet attrs) { super(context, attrs); init(); } public VerticalProgressBar(Context context) { super(context); init(); } private void init() { paint = new Paint(); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); width = getMeasuredWidth() - 1;// 宽度值 height = getMeasuredHeight() - 1;// 高度值 } @Override protected void onDraw(Canvas canvas) { paint.setColor(Color.rgb(10, 73, 160));// 设置画笔颜色, blue canvas.drawLine(0, 0, width, 0, paint);// 画顶边 canvas.drawLine(0, 0, 0, height, paint);// 画左边 canvas.drawLine(width, 0, width, height, paint);// 画右边 canvas.drawLine(0, height, width, height, paint);// 画底边 float count_height = height; float valid_height = progress / 100f * height; float one_setp_height = height / 50; float interval_height = 7; float drawed_height = 0; Log.d("wujiang", "onDraw: valid_height = " + valid_height); Log.d("wujiang", "onDraw: one_setp_height = " + one_setp_height); if (valid_height > 0) { while (drawed_height <= valid_height) { paint.setColor(Color.rgb(10, 73, 160));// 设置画笔颜色, blue canvas.drawRect(1, height - (drawed_height + one_setp_height), width, height - drawed_height, paint);// 画矩形 drawed_height += one_setp_height; if (drawed_height + one_setp_height >= valid_height) { break; } else { paint.setColor(Color.TRANSPARENT); // 设置画笔颜色,设置间隔的颜色 canvas.drawRect(1, height - (drawed_height + interval_height), width, height - drawed_height, paint);// 画矩形 drawed_height += interval_height; } } } else { canvas.drawRect(0, height - progress / 100f * height, width, height, paint);// 画矩形 } paint.setColor(Color.GREEN); paint.setTextSize(width / 3);// 设置文字大小 canvas.drawText(String.valueOf(progress), (width - getTextWidth(String.valueOf(progress))) / 2, height / 2, paint);// 画文字 super.onDraw(canvas); } /** * 拿到文字宽度 * @param str 传进来的字符串 * return 宽度 */ private int getTextWidth(String str) { // 计算文字所在矩形，可以得到宽高 Rect rect = new Rect(); paint.getTextBounds(str, 0, str.length(), rect); return rect.width(); } /** 设置progressbar进度 */ public void setProgress(int progress) { this.progress = progress; postInvalidate(); } public int getProgress() { return this.progress; } }

xml里的定义： <com.amlogic.dvb_view.VerticalProgressBar android:id="@+id/progress_quality" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginTop="@dimen/px_20.0" />

activity里的使用： VerticalProgressBar mProgressQuality = findViewById(R.id.progress_quality); mProgressQuality.setProgress(68);

THE            END