畫板基類繼承view

package com.mytest.myapplication.Utility;import android.graphics.Color; import android.util.Log; import android.view.View; import android.content.Context; import android.content.res.Resources; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Paint.Style; import android.graphics.Path; import android.graphics.Point; import android.util.AttributeSet; import android.util.DisplayMetrics; import android.view.WindowManager; import android.widget.Button; import java.lang.Thread;import java.util.ArrayList;//自定義簡單曲線圖 public class MyGraphicView extends View{public Context _Context;private Paint _mPaint;private Paint _mPaint2;public String _type="0";// private Resources _res;// private DisplayMetrics _dm;/*** 曲線上總點數*/private float[] mPoints={0,0,10,10,20,20,30,30,};/*** 縱坐標值*/private ArrayList<Double> yRawData;/*** 橫坐標值*/private ArrayList<String> xRawDatas;public MyGraphicView(Context context){this(context, null);}public MyGraphicView(Context context, AttributeSet attrs){super(context, attrs);this._Context = context;initView();}private void initView()//初始化{//this._res = _Context.getResources();this._mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);this._mPaint2 = new Paint(Paint.ANTI_ALIAS_FLAG);// _dm = new DisplayMetrics();// WindowManager wm = (WindowManager) _Context.getSystemService(Context.WINDOW_SERVICE);// wm.getDefaultDisplay().getMetrics(_dm);}@Overrideprotected void onSizeChanged(int w, int h, int oldw, int oldh)//尺寸改變事件{super.onSizeChanged(w,h,oldw,oldh);}@Overrideprotected void onDraw(Canvas canvas){_mPaint.setColor(Color.BLUE);//顏色賦值_mPaint2.setColor(Color.RED);//顏色賦值if(_type=="0") {canvas.drawLine(0, 100, getWidth(), getHeight(), _mPaint);// super.onDraw(canvas);}else{DrawXYAxis( canvas);//畫坐標和曲線// canvas.drawLines(mPoints, _mPaint);}}public void Redraw(String type)//重繪觸發{_type=type;invalidate();//重繪觸發事件}public void DrawXYAxis(Canvas canvas)//畫坐標和曲線{int allWidth=getWidth();//界面寬度int allHeight=getHeight();//界面高度canvas.drawLine(50,50,(float)(50),(float)(allHeight-50),_mPaint2);//畫y軸canvas.drawLine((float)(50),(float)(allHeight-50),(float)(allWidth-50),(float)(allHeight-50),_mPaint2);//畫x軸float[] xPoints=new float[allWidth];float[] yPoints=new float[allWidth];for(int i=0;i<allWidth;i++){xPoints[i]=i;yPoints[i]=(float)(Math.random()*400);}canvas.drawText("測試曲線",(float)(allWidth/2.0),20, _mPaint);//畫標題for(int i=10;i<allWidth;i++)//畫橫軸刻度{if(i%50==0){canvas.drawText(String.valueOf(i),i,allHeight-30, _mPaint);}}for(int i=allHeight-10;i>50;i-=50)//畫縱軸刻度{try {canvas.drawText(String.valueOf(allHeight-10-i),20,i, _mPaint);}catch (Exception e){Log.i("異常：",e.toString());}}for(int i=0;i<allWidth-2;i++)//畫曲線{canvas.drawLine(xPoints[i]+50,allHeight-210-yPoints[i],xPoints[i+1]+50,allHeight-210-yPoints[i+1], _mPaint);}}public MyThread _Th=null;public class MyThread extends Thread{public Thread th;public String thName;public MyThread(String name){thName=name;}public void run(){try {Thread.sleep(1000);run2();}catch (Exception e){Log.i("線程異常",e.toString());}}public void run2(){new Thread(new Runnable() {@Overridepublic void run() {Redraw("1");}}).start();}public void start(){if(th==null){th= new Thread(this,thName);th.start();}}public void Fstop(){if(th!=null){th.interrupt();th.stop();th=null;}}}}

繪圖顯示操作活動頁（動態加載按鈕和畫板view：graphicView）

package com.mytest.myapplication; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.DisplayMetrics; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.TableLayout;import com.mytest.myapplication.Utility.MyGraphicView;public class MyDrawActivity extends AppCompatActivity {MyGraphicView graphicView;public Button button1;public Button button2;public Button button3;public EditText editText1;public Boolean draEnable=false;public int displayTime=0;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);DisplayMetrics metric = new DisplayMetrics();getWindowManager().getDefaultDisplay().getMetrics(metric);int width = metric.widthPixels; // 屏幕寬度（像素）int height = metric.heightPixels; // 屏幕高度（像素）float density = metric.density; // 屏幕密度（0.75 / 1.0 / 1.5）int densityDpi = metric.densityDpi; // 屏幕密度DPI（120 / 160 / 240）//final LinearLayout layout = new LinearLayout(this);final TableLayout layout=new TableLayout(this);graphicView=new MyGraphicView(this,null);button1=new Button(this);button2=new Button(this);button3=new Button(this);editText1=new EditText(this);button1.setText("對角線");button2.setText("開始");button3.setText("結束");editText1.setText("1000");button1.setWidth(width);button2.setWidth(width);button3.setWidth(width);editText1.setWidth(width);layout.addView(button1);layout.addView(button2);layout.addView(button3);layout.addView(editText1);layout.addView(graphicView);setContentView(layout);button1.setOnClickListener(new Button.OnClickListener() {@Overridepublic void onClick(View v) {graphicView. Redraw("0");//重繪觸發}});/* button2.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {if(graphicView._Th==null){graphicView._Th= graphicView.new MyThread("繪圖線程");}graphicView._Th.start();// graphicView. Redraw("1");//重繪觸發}});*/button2.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {displayTime=Integer.valueOf(editText1.getText().toString());draEnable=true;new Thread(new Runnable() {@Overridepublic void run() {while(true) {if(!draEnable)return;try {Thread.sleep(displayTime);} catch (Exception e) {}runOnUiThread(new Runnable() {@Overridepublic void run() {graphicView.Redraw("1");//重繪觸發}});}}}).start();}});button3.setOnClickListener(new View.OnClickListener(){public void onClick(View v){draEnable=false;if(graphicView._Th==null)return;graphicView._Th.Fstop();}});} }

活動頁2（同步問題）

package com.mytest.myapplication; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.DisplayMetrics; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.TableLayout;import com.mytest.myapplication.Utility.MyGraphicView;import java.util.concurrent.Semaphore; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock;public class MyDrawActivity extends AppCompatActivity {MyGraphicView graphicView;public Button button1;public Button button2;public Button button3;public EditText editText1;public Boolean draEnable=false;public Boolean lockEnable=false;public int displayTime=0;Lock lock = new ReentrantLock();Semaphore semaphore = new Semaphore(1);@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);DisplayMetrics metric = new DisplayMetrics();getWindowManager().getDefaultDisplay().getMetrics(metric);int width = metric.widthPixels; // 屏幕寬度（像素）int height = metric.heightPixels; // 屏幕高度（像素）float density = metric.density; // 屏幕密度（0.75 / 1.0 / 1.5）int densityDpi = metric.densityDpi; // 屏幕密度DPI（120 / 160 / 240）//final LinearLayout layout = new LinearLayout(this);final TableLayout layout=new TableLayout(this);graphicView=new MyGraphicView(this,null);button1=new Button(this);button2=new Button(this);button3=new Button(this);editText1=new EditText(this);button1.setText("對角線");button2.setText("開始");button3.setText("結束");editText1.setText("1000");button1.setWidth(width);button2.setWidth(width);button3.setWidth(width);editText1.setWidth(width);layout.addView(button1);layout.addView(button2);layout.addView(button3);layout.addView(editText1);layout.addView(graphicView);setContentView(layout);button1.setOnClickListener(new Button.OnClickListener() {@Overridepublic void onClick(View v) {graphicView. Redraw("0");//重繪觸發}});/* button2.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {if(graphicView._Th==null){graphicView._Th= graphicView.new MyThread("繪圖線程");}graphicView._Th.start();// graphicView. Redraw("1");//重繪觸發}});*/button2.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {displayTime=Integer.valueOf(editText1.getText().toString());draEnable=true;lockEnable=false;new Thread(new Runnable() {@Overridepublic void run() {while(true) {try{while(lockEnable){Thread.sleep(1);}lockEnable=true;if (!draEnable) return;try {Thread.sleep(displayTime);} catch (Exception e) {String content=e.toString();// lockEnable=false;}runOnUiThread(new Runnable() {@Overridepublic void run() {graphicView.Redraw("1");//重繪觸發lockEnable=false;}});}catch (Exception e){String content=e.toString();lockEnable=false;}}}}).start();}});button3.setOnClickListener(new View.OnClickListener(){public void onClick(View v){draEnable=false;if(graphicView._Th==null)return;graphicView._Th.Fstop();semaphore.release();}});} }

活動頁3(同步問題)?

package com.mytest.myapplication; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.DisplayMetrics; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.TableLayout;import com.mytest.myapplication.Utility.MyGraphicView;import java.util.concurrent.Semaphore; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock;public class MyDrawActivity extends AppCompatActivity {MyGraphicView graphicView;public Button button1;public Button button2;public Button button3;public EditText editText1;public Boolean draEnable=false;public Boolean lockEnable=false;public int displayTime=0;Lock lock = new ReentrantLock();Semaphore semaphore = new Semaphore(1);@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);DisplayMetrics metric = new DisplayMetrics();getWindowManager().getDefaultDisplay().getMetrics(metric);int width = metric.widthPixels; // 屏幕寬度（像素）int height = metric.heightPixels; // 屏幕高度（像素）float density = metric.density; // 屏幕密度（0.75 / 1.0 / 1.5）int densityDpi = metric.densityDpi; // 屏幕密度DPI（120 / 160 / 240）//final LinearLayout layout = new LinearLayout(this);final TableLayout layout=new TableLayout(this);graphicView=new MyGraphicView(this,null);button1=new Button(this);button2=new Button(this);button3=new Button(this);editText1=new EditText(this);button1.setText("對角線");button2.setText("開始");button3.setText("結束");editText1.setText("1000");button1.setWidth(width);button2.setWidth(width);button3.setWidth(width);editText1.setWidth(width);layout.addView(button1);layout.addView(button2);layout.addView(button3);layout.addView(editText1);layout.addView(graphicView);setContentView(layout);button1.setOnClickListener(new Button.OnClickListener() {@Overridepublic void onClick(View v) {graphicView. Redraw("0");//重繪觸發}});/* button2.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {if(graphicView._Th==null){graphicView._Th= graphicView.new MyThread("繪圖線程");}graphicView._Th.start();// graphicView. Redraw("1");//重繪觸發}});*/button2.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {displayTime=Integer.valueOf(editText1.getText().toString());draEnable=true;lockEnable=false;new Thread(new Runnable() {@Overridepublic void run() {while(true) {try{while(lockEnable){Thread.sleep(1);}lockEnable=true;if (!draEnable) return;try {Thread.sleep(displayTime);} catch (Exception e) {String content=e.toString();// lockEnable=false;}runOnUiThread(new Runnable() {@Overridepublic void run() {graphicView.Redraw("1");//重繪觸發lockEnable=false;}});}catch (Exception e){String content=e.toString();lockEnable=false;}}}}).start();}});button3.setOnClickListener(new View.OnClickListener(){public void onClick(View v){draEnable=false;if(graphicView._Th==null)return;graphicView._Th.Fstop();semaphore.release();}});} }

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