di chuyển view với tọa độ vừa nhận vào chính giữa màn hình - Cờ cảo

[congnghebachkhoahanoi]

Chào các bác,
Tình hình là em đang làm một niên luận Caro Online, và em chọn View để vẽ bằng canvas...(do mới tiếp xúc với android và khả năng ngoại ngữ kém, nên có thể không hiểu đúng). và em cần hiển thị địa chỉ người chơi 1 vừa đánh sang người chơi 2 (ở giữa màn hình). Nhưng em kô biết làm cách nào. Mong các bác chỉ giúp. Mã nguồn của e ạ!
gameview.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" 
    >
    <ScrollView android:id="@+id/ScrollView02" 
            android:layout_width="wrap_content" 
            android:layout_height="325dp"
            xmlns:android="http://schemas.android.com/apk/res/android">
				<HorizontalScrollView android:id="@+id/HorizontalScrollView01" 
                      android:layout_width="wrap_content" 
                      android:layout_height="wrap_content">
			    	    <RelativeLayout
			    	         android:layout_width="1650dp"
			    			 android:layout_height="1700dp"
			    			 android:id="@+id/main_gameview"
			    	    ></RelativeLayout>
        		</HorizontalScrollView>
    </ScrollView>
	<LinearLayout 
	    android:layout_marginTop="325dp" 
	    android:layout_width="fill_parent" 
	    android:layout_height="50dp" 
	    android:orientation="horizontal"
	    android:layout_gravity="center_vertical"
	    >
    <Button
        android:layout_width="100dp"
        android:layout_height="50dp"
        android:text="Thoat"
        android:id="@+id/quit_game" 
        />
    <Button
        android:layout_width="100dp"
        android:layout_height="50dp"
        android:text="Xin hoa"
        android:id="@+id/hoa" 
        />
    <Button
        android:layout_width="100dp"
        android:layout_height="50dp"
        android:text="Xin thua"
        android:id="@+id/thua"
        
        />
    </LinearLayout>
</RelativeLayout>

GameView.java

package com.example.app3;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;

import android.R.color;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.DialogInterface.OnClickListener;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Picture;
import android.graphics.RectF;
import android.location.Location;
import android.os.Bundle;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.Toast;
import android.util.AttributeSet;
import android.view.DragEvent;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnDragListener;
import android.view.View.OnKeyListener;
import android.view.View.OnTouchListener;

public class GameView extends Activity {
   // DrawView drawView;
	private Socket client;
	 private PrintWriter printwriter;
	int WIN=0;
    int State=1;
    int FINAL=0;
    float xx,yy;
    int curr_x,curr_y;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.gameview);
        Button Quit = (Button)findViewById(R.id.quit_game);
		Button Thua = (Button)findViewById(R.id.thua);
		Quit.setOnTouchListener(new OnTouchListener() {
			
			@Override
			public boolean onTouch(View arg0, MotionEvent arg1) {
				// TODO Auto-generated method stub
				Thread th = new Thread(){
					public void run(){
						finish();
					}
				};
			th.start();
				return false;
			}
		});
		Thua.setOnTouchListener(new OnTouchListener() {
			
			@Override
			public boolean onTouch(View v, MotionEvent event) {
				// TODO Auto-generated method stub
				Button Z = (Button)findViewById(R.id.hoa);
				 Z.setText("YOU LOSE");
				 Thread room = new Thread(){
						public void run(){
							try {
								sleep(5000);
							} catch (InterruptedException e1) {
								// TODO Auto-generated catch block
								e1.printStackTrace();
							}
							finish();
						}
					};
				room.start();
				return false;
			}
		});
        final DrawView obj = new DrawView(this);
        RelativeLayout layout = (RelativeLayout) findViewById(R.id.main_gameview);
        layout.addView(obj,1275,1275);
        
        layout.setOnTouchListener(new OnTouchListener() {
			@Override
			public boolean onTouch(View v, MotionEvent event) {
				// TODO Auto-generated method stub
				//System.out.println(event.getX()+" "+event.getY());
				if (event.getAction()==MotionEvent.ACTION_MOVE){
					xx = event.getX();
					yy = event.getY();
					return true;
				}
				if (event.getAction()==MotionEvent.ACTION_UP){
					if (event.getX()-xx<1 && event.getY()-yy<1){
						int x = (Math.round(event.getX())/25)*25;
						int y = (Math.round(event.getY())/25)*25;
						if ((obj.canCheck(x,y)==true && WIN==0)){
							//if (FINAL==0){
							obj.check(x, y, State);
							obj.requestLayout();
							 if (obj.win(x/25,y/25,State)==true){
								    //Toast.makeText(null, "You WIN", Toast.LENGTH_LONG);
								 Button Z = (Button)findViewById(R.id.hoa);
								 obj.setEnabled(false);
								 if (State==1)
									 Z.setText("YOU WIN");
								 else
								 Z.setText("YOU LOSE");
								 WIN=State;
								 obj.showLineWin();
								 Thread room = new Thread(){
										public void run(){
											try {
												sleep(5000);
											} catch (InterruptedException e1) {
												// TODO Auto-generated catch block
												e1.printStackTrace();
											}
											finish();
										}
									};
								room.start();
							 }
							//X.setText(x/25+"");
							//Y.setText(y/25+"");
							 try {
							     client = new Socket("192.168.2.1", 9999);  //connect to server
							     printwriter = new PrintWriter(client.getOutputStream(),true);
							     printwriter.write(x/25+","+y/25);  //write the message to output stream
							     printwriter.flush();
							     printwriter.close();
							     client.close();   //closing the connection
							 
							    } catch (UnknownHostException e) {
							     e.printStackTrace();
							    } catch (IOException e) {
							     e.printStackTrace();
							    }
							curr_x=x;curr_y=y;
							if (State==1) State=2;
				    		else State=1;
							}
					}
					return true;
				}
				return true;
			}
		});
    }
    protected void onDestroy()
    {
      super.onDestroy();
    }   
}


@SuppressLint("DrawAllocation")
class DrawView extends View {
	Paint paint = new Paint();
	int map[][] = new int[55][55];
	int x1=-1,y1=-1,x2=-1,y2=-1;
	int StateWin=0;
	int cx,cy,cs;
    public DrawView(Context context) {
        super(context);
        setFocusable(true);
        setFocusableInTouchMode(true);
        for (int i=0;i<50;i++)
        	for (int j=0;j<50;j++)
        		map[i][j]=0;
        paint.setColor(Color.RED);
    }
    public void showLineWin(){
    	postInvalidate();
    }
    public void check(int x,int y,int type){
    		map[x/25][y/25]=type;
    		postInvalidate();
    }
    public boolean win(int x,int y,int State){
    	cx=x;cy=y;cs=State;
    	int tx1=x,tx2=x,ty1=y,ty2=y;
    	if (map[x][y]==0) return false;
    	int inc=1;
    	
    	//COL
    	for (int i=1;y-i>=0;i++){
    		if (map[x][y]==map[x][y-i]){
    			inc++;
    			tx1=x;
    			ty1=y-i;
    		}else break;
    	}
    	for (int i=1;y+i<=50;i++){
    		if (map[x][y]==map[x][y+i]){
    			inc++;
    			tx2=x;
    			ty2=y+i;
    		}else break;
    	}
    	if (inc>=5){
    		x1=tx1;x2=tx2;
    		y1=ty1;y2=ty2;
    		StateWin=State;
    		return true;
    	}
    	//END COL
    	tx1=x;tx2=x;ty1=y;ty2=y;
    	//ROW
    	inc=1;
    	for (int i=1;x-i>=0;i++)
    		if (map[x][y]==map[x-i][y]){
    			inc++;
    			tx1=x-i;
    			ty1=y;
    		}else break;
    	for (int i=1;x+i<=50;i++)
    		if (map[x][y]==map[x+i][y]){
    			inc++;
    			tx2=x+i;
    			ty2=y;
    		}else break;
    	if (inc>=5){
    		x1=tx1;x2=tx2;
    		y1=ty1;y2=ty2;
    		StateWin=State;
    		return true;
    	}
    	//END ROW
    	tx1=x;tx2=x;ty1=y;ty2=y;
    	//CHEO 1
    	inc=1;
    	for (int i=1;x-i>=0 && y-i>=0 ;i++)
    		if (map[x][y]==map[x-i][y-i]){
    			inc++;
    			tx1=x-i;
    			ty1=y-i;
    		}else break;

    	for (int i=1;x+i<=50 && y+i<=50;i++)
    		if (map[x][y]==map[x+i][y+i]){
    			inc++;
    			tx2=x+i;
    			ty2=y+i;
    		} else break;

    	if (inc>=5) {x1=tx1;x2=tx2;
		y1=ty1;y2=ty2;StateWin=State;return true;}
    	//END CHEO 1
    	tx1=x;tx2=x;ty1=y;ty2=y;
    	//CHEO 2
    	inc=1;
    	for (int i=1;x-i>=0 && y+i<=50;i++)
    		if (map[x][y]==map[x-i][y+i]){
    			inc++;
    			tx1=x-i;
    			ty1=y+i;
    		}else break;

    	for (int i=1;x+i<=50 && y-i>=0;i++)
    		if (map[x][y]==map[x+i][y-i]){
    			inc++;
    			tx2=x+i;
    			ty2=y-i;
    		}else break;

    	if (inc>=5) {x1=tx1;x2=tx2;
		y1=ty1;y2=ty2;StateWin=State;return true;}
    	//END CHEO 2

    	
    	return false;
    }
    public boolean canCheck(int x,int y){
    	if (map[x/25][y/25]==0)
    		return true;
    	return false;
    }
    @Override
    public void onDraw(Canvas canvas) {
    		paint.setColor(Color.GRAY);
    		paint.setStrokeWidth(0);
    		for (int i=1;i<=51;i++){
    			canvas.drawLine(25*i, 0, 25*i, 1275, paint);
    			canvas.drawLine(0, i*25, 1275, i*25, paint);
    		}
    		for (int i=0;i<=50;i++)
    			for (int j=0;j<=50;j++)
    				if (map[i][j]==1){
    					paint.setColor(Color.GREEN);
    					canvas.drawCircle((float)(i*25.0+12.5), (float)(j*25+12.5),10, paint);
    					paint.setColor(Color.WHITE);
    					canvas.drawCircle((float)(i*25.0+12.5), (float)(j*25+12.5),5 , paint);
    				}
    				else if (map[i][j]==2){
    					paint.setColor(Color.RED);
    					paint.setStrokeWidth(5);
    					canvas.drawLine(i*25+5, j*25+5, i*25+20, j*25+20, paint);
    					canvas.drawLine(i*25+20, j*25+5, i*25+5, j*25+20, paint);
    				}
    		//paint.setStrokeWidth(5);
    		//paint.setColor(Color.GREEN);
    		//canvas.drawLine(0,0,100,100, paint);
    		if (StateWin!=0){
    			paint.setStrokeWidth(3);
    			if (StateWin==1)
    				paint.setColor(Color.GREEN);
    			else
    				paint.setColor(Color.RED);
    			canvas.drawLine((float)(x1*25+12.5),(float)(y1*25+12.5),(float)(x2*25+12.5),(float)(y2*25+12.5), paint);
    			
    		}
    }
}

Mong các bác giúp đỡ em...Chân thành cảm ơn các bác.

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[ngoctran89]

Đại loại như này:

// Get DisplayMetrics object.        DisplayMetrics metrics = new DisplayMetrics();        mContext.getWindowManager().getDefaultDisplay().getMetrics(metrics);                    params.height = metrics.heightPixels;        params.width = metrics.widthPixels;        // calculator position of view with hight and width of screen.                // and draw view with canvas and position.