android畫扇形

❶ 在Android中要實現圖表統計該怎麼做

package com.yzxy.draw;

import java.util.ArrayList;
import java.util.HashMap;
import com.yzxy.draw.tools.Tools;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Point;
import android.graphics.RectF;
import android.graphics.Paint.Style;
import android.graphics.Typeface;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;

@SuppressLint("ViewConstructor")
class MyTuView extends View{

public static final int RECT_SIZE = 10;
private Point mSelectedPoint = null;
public static enum Mstyle
{
Line,scroll
}

private Mstyle mstyle=Mstyle.Line;
private Point[] mPoints = new Point[8];

Context context;
Activity act;
int bheight=0;
Tools tool=new Tools();
HashMap map;
ArrayList dlk;
int totalvalue=30;
int pjvalue=5;
String xstr,ystr;
int margint=15;
int marginb=40;
int c=0;
int resid=0;
Boolean isylineshow;

public MyTuView(Context context,HashMap map,int totalvalue,int pjvalue,String xstr,String ystr,Boolean isylineshow)
{
super(context);
this.context=context;
this.act = (Activity)context;
this.map=map;
this.totalvalue=totalvalue;
this.pjvalue=pjvalue;
this.xstr=xstr;
this.ystr=ystr;
this.isylineshow=isylineshow;
act.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}

@SuppressLint("DrawAllocation")
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// canvas.drawColor(Color.GRAY);
if(c!=0)
this.setbg(c);
if(resid!=0)
this.setBackgroundResource(resid);
dlk=tool.getintfrommap(map);
int height=getHeight();
if(bheight==0)
bheight=height-marginb;

int width=getWidth();

Log.i("w", getWidth()+":"+getHeight());
int blwidh=tool.dip2px(context,50);
int pjsize=totalvalue/pjvalue;

Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setColor(Color.GRAY);
paint.setStrokeWidth(1);
paint.setStyle(Style.STROKE);

// 畫直線(橫向)
for(int i=0;i xlist=new ArrayList();//記錄每個x的值
//畫直線（縱向）
for(int i=0;i dlk,HashMap map,ArrayList xlist,int max,int h)
{
Point[] points=new Point[dlk.size()];
for(int i=0;i getMap() {
return map;
}

public void setMap(HashMap map) {
this.map = map;
}

public int getTotalvalue() {
return totalvalue;
}

public void setTotalvalue(int totalvalue) {
this.totalvalue = totalvalue;
}

public int getPjvalue() {
return pjvalue;
}

public void setPjvalue(int pjvalue) {
this.pjvalue = pjvalue;
}

public String getXstr() {
return xstr;
}

public void setXstr(String xstr) {
this.xstr = xstr;
}

public String getYstr() {
return ystr;
}

public void setYstr(String ystr) {
this.ystr = ystr;
}

public int getMargint() {
return margint;
}

public void setMargint(int margint) {
this.margint = margint;
}

public Boolean getIsylineshow() {
return isylineshow;
}

public void setIsylineshow(Boolean isylineshow) {
this.isylineshow = isylineshow;
}

public int getMarginb() {
return marginb;
}

public void setMarginb(int marginb) {
this.marginb = marginb;
}

public Mstyle getMstyle() {
return mstyle;
}

public void setMstyle(Mstyle mstyle) {
this.mstyle = mstyle;
}

public int getBheight() {
return bheight;
}

public void setBheight(int bheight) {
this.bheight = bheight;
}

public int getC() {
return c;
}

public void setC(int c) {
this.c = c;
}

public int getResid() {
return resid;
}

public void setResid(int resid) {
this.resid = resid;
}

}

代碼片段
package com.yzxy.draw.tools;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import android.content.Context;
import android.graphics.Bitmap;
import android.os.Environment;

public class Tools
{
private final static String ALBUM_PATH = Environment.getExternalStorageDirectory() + "/yueqiu/";

public int dip2px(Context context, float dpValue)
{
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}

public int px2dip(Context context, float pxValue)
{
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (pxValue / scale + 0.5f);
}

public ArrayList getintfrommap(HashMap map)
{
ArrayList dlk=new ArrayList();
int position=0;
@SuppressWarnings("rawtypes")
Set set= map.entrySet();
@SuppressWarnings("rawtypes")
Iterator iterator = set.iterator();

while(iterator.hasNext())
{
@SuppressWarnings("rawtypes")
Map.Entry mapentry = (Map.Entry)iterator.next();
dlk.add((Double)mapentry.getKey());
}
for(int i=0;i

代碼片段
package com.yzxy.draw;

import java.io.IOException;
import java.util.HashMap;

import com.yzxy.draw.MyTuView.Mstyle;
import com.yzxy.draw.tools.Tools;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;

import android.widget.RelativeLayout;
import android.widget.RelativeLayout.LayoutParams;
import android.widget.Toast;
import android.app.Activity;
import android.content.res.XmlResourceParser;
import android.graphics.Bitmap;
import android.graphics.Color;

public class MainActivity extends Activity {

MyTuView tu;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

HashMap map=new HashMap();
map.put(1.0, 8.0);
map.put(7.0, 130.0);
map.put(2.0, 4.0);
map.put(3.0, 1.0);
map.put(4.0, 18.0);
map.put(5.0, 160.0);
map.put(6.0, 180.0);
map.put(8.1, 133.5);
tu=new MyTuView(this,map,200,50,"x","y",false);
// tu.setC(Color.CYAN);
tu.setResid(R.drawable.bg);
// tu.setBheight(200);
tu.setTotalvalue(200);

tu.setPjvalue(50);
tu.setXstr("x");
tu.setYstr("y");
tu.setMargint(20);
tu.setBackgroundColor(Color.WHITE);
tu.setMarginb(50);
tu.setMstyle(Mstyle.scroll);
RelativeLayout rela=getlayout(R.layout.activity_main);
rela.addView(tu);
LayoutParams parm=new LayoutParams(1200,400);
parm.setMargins(50, 50, 50, 100);
tu.setLayoutParams(parm);
setContentView(rela);

}

@Override
public boolean onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item)
{
// TODO Auto-generated method stub
if(item.getItemId() == R.id.menu_settings)
{
if (false == tu.isDrawingCacheEnabled())
{
tu.setDrawingCacheEnabled(true);
}
Bitmap bitmap = tu.getDrawingCache();
Tools tool=new Tools();
try {
Boolean b=tool.saveFile(bitmap, "aaaa.png");
if(b)
Toast.makeText(this, "success", Toast.LENGTH_SHORT).show();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(item.getItemId() == R.id.menu_ch)
{
HashMap map=new HashMap();
map.put(1.0, 21.0);
map.put(3.0, 25.0);
map.put(4.0, 32.0);
map.put(5.0, 31.0);
map.put(6.0, 26.0);

tu.setTotalvalue(40);
tu.setPjvalue(10);
tu.setMap(map);
tu.setIsylineshow(true);
tu.postInvalidate();
}
if(item.getItemId() == R.id.menu_ch2)
{
HashMap map=new HashMap();
map.put(1.0, 41.0);
map.put(3.0, 25.0);
map.put(4.0, 32.0);
map.put(5.0, 41.0);
map.put(6.0, 16.0);
map.put(7.0, 36.0);
map.put(8.0, 26.0);
tu.setTotalvalue(50);
tu.setPjvalue(10);
tu.setMap(map);
tu.setMstyle(Mstyle.Line);
tu.setIsylineshow(false);
tu.postInvalidate();
}
return true;
}

public RelativeLayout getlayout(int r)
{
LayoutInflater inflater = (LayoutInflater)getSystemService(android.content.Context.LAYOUT_INFLATER_SERVICE );
try {
XmlResourceParser parser = getResources().getLayout(r);
RelativeLayout layout = (RelativeLayout) inflater.inflate(parser, null);
return layout;
}catch (Exception e) {
// TODO: handle exception
}
return null;
}
}

❷ 在android裡面如何繪制一個有顏色的餅狀圖，餅狀圖的扇形區域根據輸入的數字進行變化 圖如下

參考答案 鐵杵能磨成針，但木杵只能磨成牙簽，材料不對，再努力也沒用。

❸ android 怎樣讓畫出的弧形有刻度

public class XChartCalc {

//Position位置
private float posX = 0.0f;
private float posY = 0.0f;

public XChartCalc()
{

}

//依圓心坐標，半徑，扇形角度，計算出扇形終射線與圓弧交叉點的xy坐標
public void CalcArcEndPointXY(float cirX, float cirY, float radius, float cirAngle){

//將角度轉換為弧度
float arcAngle = (float) (Math.PI * cirAngle / 180.0);
if (cirAngle < 90)
{
posX = cirX + (float)(Math.cos(arcAngle)) * radius;
posY = cirY + (float)(Math.sin(arcAngle)) * radius;
}
else if (cirAngle == 90)
{
posX = cirX;
posY = cirY + radius;
}
else if (cirAngle > 90 && cirAngle < 180)
{
arcAngle = (float) (Math.PI * (180 - cirAngle) / 180.0);
posX = cirX - (float)(Math.cos(arcAngle)) * radius;
posY = cirY + (float)(Math.sin(arcAngle)) * radius;
}
else if (cirAngle == 180)
{
posX = cirX - radius;
posY = cirY;
}
else if (cirAngle > 180 && cirAngle < 270)
{
arcAngle = (float) (Math.PI * (cirAngle - 180) / 180.0);
posX = cirX - (float)(Math.cos(arcAngle)) * radius;
posY = cirY - (float)(Math.sin(arcAngle)) * radius;
}
else if (cirAngle == 270)
{
posX = cirX;
posY = cirY - radius;
}
else
{
arcAngle = (float) (Math.PI * (360 - cirAngle) / 180.0);
posX = cirX + (float)(Math.cos(arcAngle)) * radius;
posY = cirY - (float)(Math.sin(arcAngle)) * radius;
}

}

//////////////
public float getPosX() {
return posX;
}

public float getPosY() {
return posY;
}

❹ Android 自定義扇形進度條。。。

大神搞的：https://github.com/Todd-Davies/ProgressWheel