小程序 XY图表.rar

package com.testy; import java.util.Vector; import com.testy.R; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Point; import android.graphics.Rect; import android.graphics.RectF; import android.graphics.Typeface; import android.graphics.Bitmap.Config; import android.graphics.Paint.FontMetrics; import android.os.Bundle; import android.widget.ImageView; public class main extends Activity { // these_labela has elemnes[label,maxX,maxY] static int draw_only_this_idx = -1; static int[] drawSizes; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.testy); setTitle("Quick XY Plot"); ImageView image = (ImageView) findViewById(R.id.testy_img); Bitmap emptyBmap = Bitmap.createBitmap(250, 200, Config.ARGB_8888); int width = emptyBmap.getWidth(); int height = emptyBmap.getHeight(); Bitmap charty = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); charty = quicky_XY(emptyBmap); image.setImageBitmap(charty); } public static Bitmap quicky_XY(Bitmap bitmap) { // xode to get bitmap onto screen Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888); Canvas canvas = new Canvas(output); final int color = 0xff0B0B61; final Paint paint = new Paint(); final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); final RectF rectF = new RectF(rect); final float roundPx = 12; // get the little rounded cornered outside paint.setAntiAlias(true); canvas.drawARGB(0, 0, 0, 0); paint.setColor(color); canvas.drawRoundRect(rectF, roundPx, roundPx, paint); // ---- NOw just draw on this bitmap // Set the labels info manually String[] cur_elt_array = new String[4]; cur_elt_array[0]="Voltage"; cur_elt_array[1]="volts"; cur_elt_array[2]="93"; // max cur_elt_array[3]="0"; //min Vector labels = new Vector(); labels.add(cur_elt_array); draw_the_grid(canvas,labels); // se the data to be plotted and we should on our way Vector data_2_plot = new Vector(); data_2_plot.add("0.2") ; data_2_plot.add("1.2") ; data_2_plot.add("9.6") ; data_2_plot.add("83.2") ; data_2_plot.add("44.2") ; data_2_plot.add("20.2") ; data_2_plot.add("16.2") ; plot_array_list(canvas , data_2_plot , labels , "the title" , 0 ); canvas.drawBitmap(bitmap, rect, rect, paint); return output; } // these_labels is vector of [label,units,max.min] public static void draw_the_grid(Canvas this_g, Vector these_labels) { double rounded_max = 0.0; double rounded_min = 0.0; double rounded_max_temp; Object curElt; String[] cur_elt_array; int left_margin_d, right_margin_d; if( draw_only_this_idx == -1) curElt = these_labels.elementAt(0); // default it to 1st one if non set else curElt = these_labels.elementAt(draw_only_this_idx); // now just the 1st elt cur_elt_array = (String[])curElt; rounded_max = get_ceiling_or_floor (Double.parseDouble(cur_elt_array[2]) , true); rounded_min = get_ceiling_or_floor (Double.parseDouble(cur_elt_array[3]) , false); // ok so now we have the max value of the set just get a cool ceiling and we go on final Paint paint = new Paint(); paint.setTextSize(15); left_margin_d = getCurTextLengthInPixels(paint, Double.toString(rounded_max)); //keep the position for later drawing -- leave space for the legend int p_height = 170; int p_width = 220; int[] tmp_draw_sizes = {2 + left_margin_d, 25,p_width - 2 - left_margin_d ,p_height - 25 -5}; drawSizes = tmp_draw_sizes; //keep it for later processing //with the mzrgins worked out draw the plotting grid paint.setStyle(Paint.Style.FILL); paint.setColor(Color.WHITE ); // Android does by coords this_g.drawRect(drawSizes[0], drawSizes[1],drawSizes[0]+ drawSizes[2], drawSizes[1]+ drawSizes[3] , paint); paint.setColor(Color.GRAY ); // finally draw the grid paint.setStyle(Paint.Style.STROKE); this_g.drawRect(drawSizes[0], drawSizes[1],drawSizes[0]+ drawSizes[2], drawSizes[1]+ drawSizes[3] , paint); for(int i=1; i < 5 ; i++) { this_g.drawLine(drawSizes[0], drawSizes[1] + (i * drawSizes[3] / 5), drawSizes[0] + drawSizes[2], drawSizes[1] + (i * drawSizes[3] / 5), paint); this_g.drawLine(drawSizes[0]+ (i * drawSizes[2] / 5), drawSizes[1], drawSizes[0] + (i * drawSizes[2] / 5), drawSizes[1] + drawSizes[3], paint); } // good for one value print_axis_values_4_grid(this_g, cur_elt_array[1] , Double.toString(rounded_max) , Double.toString(rounded_min), cur_elt_array[0] , 2 ,0 ); } // --- end of draw_grid --- // provate void print_axis_values_4_grid(Graphics thisDrawingArea, string cur_units , string cur_max , string cur_min , string cur_label , ByVal x_guide As Integer, ByVal this_idx As Integer) public static void print_axis_values_4_grid(Canvas thisDrawingArea, String cur_units , String cur_max , String cur_min , String cur_label , int x_guide , int this_idx ) { String this_str; double delta = ( Double.valueOf(cur_max).doubleValue() - Double.valueOf(cur_min).doubleValue() ) / 5; final Paint paint = new Paint(); paint.setColor( Color.WHITE ); paint.setTypeface( Typeface.SANS_SERIF ); //Font smallyFont = Font.getDefault().derive(Font.PLAIN, 12); // thisDrawingArea.setFont(smallyFont); paint.setTextSize(8); for(int i = 0; i<6 ; i++) { // 'work our the values so is proper this_str =Double.toString( (Double.valueOf(cur_min).doubleValue() + delta * i) ); final int point = this_str.indexOf('.'); if (point > 0) { // If has a decimal point, may need to clip off after or force 2 decimal places this_str = this_str + "00"; this_str = this_str.substring(0,point+3); } else { this_str = this_str + ".00"; } if (i == 5) // thisDrawingArea.drawText(this_str, x_guide - 2, drawSizes[1] + drawSizes[3] - (i *drawSizes[3] / 5) ); thisDrawingArea.drawText(this_str, x_guide - 2, drawSizes[1] + drawSizes[3] - (i *drawSizes[3] / 5) , paint ); else thisDrawingArea.drawText(this_str, x_guide- 2, drawSizes[1] + drawSizes[3] - (i * drawSizes[3] / 5) -3, paint); } // smallyFont = Font.getDefault().derive(Font.BOLD, 12); // thisDrawingArea.setFont(smallyFont); paint.setTextSize(10); switch(this_idx ) { case 0: thisDrawingArea.drawText(" " + cur_label +" - " +cur_units,