Create Options Menu with SurfaceView
To create Options Menu on SurfaceView, simple override onCreateOptionsMenu() to add menu options, and override onOptionsItemSelected() to handle the event.
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| package com.TestSurefaceView;import android.app.Activity;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.MotionEvent;import android.view.SurfaceHolder;import android.view.SurfaceView;import android.widget.Toast;public class TestSurefaceView extends Activity { MySurfaceView mySurfaceView; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mySurfaceView = new MySurfaceView(this); setContentView(mySurfaceView); } @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); mySurfaceView.onResumeMySurfaceView(); } @Override protected void onPause() { // TODO Auto-generated method stub super.onPause(); mySurfaceView.onPauseMySurfaceView(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // TODO Auto-generated method stub menu.add(0, 0, 0, "Do Something"); menu.add(0, 1, 1, "Do Something Else"); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // TODO Auto-generated method stub switch(item.getItemId()){ case 0: Toast.makeText(TestSurefaceView.this, "Do Something", Toast.LENGTH_LONG).show(); break; case 1: Toast.makeText(TestSurefaceView.this, "Do Something Else", Toast.LENGTH_LONG).show(); break; } return true; } class MySurfaceView extends SurfaceView implements Runnable{ //In this test, handle maximum of 2 pointer final int MAX_POINT_CNT = 2; private Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); float[] x = new float[MAX_POINT_CNT]; float[] y = new float[MAX_POINT_CNT]; boolean[] isTouch = new boolean[MAX_POINT_CNT]; float[] x_last = new float[MAX_POINT_CNT]; float[] y_last = new float[MAX_POINT_CNT]; boolean[] isTouch_last = new boolean[MAX_POINT_CNT]; Thread thread = null; SurfaceHolder surfaceHolder; volatile boolean running = false; volatile boolean touched = false; volatile float touched_x, touched_y; public MySurfaceView(Context context) { super(context); // TODO Auto-generated constructor stub surfaceHolder = getHolder(); } public void onResumeMySurfaceView(){ running = true; thread = new Thread(this); thread.start(); } public void onPauseMySurfaceView(){ boolean retry = true; running = false; while(retry){ try { thread.join(); retry = false; } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } @Override public void run() { // TODO Auto-generated method stub while(running){ if(surfaceHolder.getSurface().isValid()){ Canvas canvas = surfaceHolder.lockCanvas(); //... actual drawing on canvas paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(1); if(isTouch[0]){ if(isTouch_last[0]){ paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(5); paint.setColor(Color.RED); canvas.drawLine(x_last[0], y_last[0], x[0], y[0], paint); } } if(isTouch[1]){ if(isTouch_last[1]){ paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(5); paint.setColor(Color.BLUE); canvas.drawLine(x_last[1], y_last[1], x[1], y[1], paint); } } surfaceHolder.unlockCanvasAndPost(canvas); } } } @Override public boolean onTouchEvent(MotionEvent motionEvent) { int pointerIndex = ((motionEvent.getAction() & MotionEvent.ACTION_POINTER_ID_MASK) >> MotionEvent.ACTION_POINTER_ID_SHIFT); int pointerId = motionEvent.getPointerId(pointerIndex); int action = (motionEvent.getAction() & MotionEvent.ACTION_MASK); int pointCnt = motionEvent.getPointerCount(); if (pointCnt <= MAX_POINT_CNT){ if (pointerIndex <= MAX_POINT_CNT - 1){ for (int i = 0; i < pointCnt; i++) { int id = motionEvent.getPointerId(i); x_last[id] = x[id]; y_last[id] = y[id]; isTouch_last[id] = isTouch[id]; x[id] = motionEvent.getX(i); y[id] = motionEvent.getY(i); } switch (action){ case MotionEvent.ACTION_DOWN: isTouch[pointerId] = true; break; case MotionEvent.ACTION_POINTER_DOWN: isTouch[pointerId] = true; break; case MotionEvent.ACTION_MOVE: isTouch[pointerId] = true; break; case MotionEvent.ACTION_UP: isTouch[pointerId] = false; isTouch_last[pointerId] = false; break; case MotionEvent.ACTION_POINTER_UP: isTouch[pointerId] = false; isTouch_last[pointerId] = false; break; case MotionEvent.ACTION_CANCEL: isTouch[pointerId] = false; isTouch_last[pointerId] = false; break; default: isTouch[pointerId] = false; isTouch_last[pointerId] = false; } } } return true; } }}akmwww.cdacians.com |
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