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我從畫布開始，我需要幫助。 我想在「房間」中表示實時座標。首先，當我創建水面持有人時，我畫「房間」並且工作正常。我的想法代表了這個房間的不同點。更新畫布和支架
這是我的活動：
package com.example.grafica;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.res.Configuration;
import android.graphics.Point;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TableLayout;
import android.widget.TextView;
@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
public class MainActivity extends Activity {
private LayoutInflater myInflater = null;
private TextView tx1, tx2, tx3, tx4, tx5, tx6, tx7;
float ancho = (float) 5.20;
float largo = (float) 3.50;
private TableLayout table, table2;
private LinearLayout.LayoutParams params, params2;
private MySurface surface;
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.i("telo", "oncreate");
super.onCreate(savedInstanceState);
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
setContentView(R.layout.activity_main);
myInflater = LayoutInflater.from(this);
View overView = myInflater.inflate(R.layout.segundacapa, null);
this.addContentView(overView, new LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
}
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
setContentView(R.layout.activity_main);
myInflater = LayoutInflater.from(this);
View overView = myInflater.inflate(R.layout.segundacapaland, null);
this.addContentView(overView, new LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
}
surface =(MySurface)findViewById(R.id.surface);
tx1 = (TextView) findViewById(R.id.textView2);
tx2 = (TextView) findViewById(R.id.textView3);
tx3 = (TextView) findViewById(R.id.textView4);
tx4 = (TextView) findViewById(R.id.textView5);
tx5 = (TextView) findViewById(R.id.textView7);
tx6 = (TextView) findViewById(R.id.textView8);
tx7 = (TextView) findViewById(R.id.textView9);
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
int height = size.y;
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
table = (TableLayout) findViewById(R.id.table);
params = (LinearLayout.LayoutParams) table.getLayoutParams();
float ratio = ancho/largo;
float aux = width/ratio;
params.topMargin = (int) aux + 20;
surface.xini = 20;
surface.yini = 20;
surface.xend = width - 20;
surface.yend = aux;
}
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
table2 = (TableLayout) findViewById(R.id.table2);
params2 = (LinearLayout.LayoutParams) table2.getLayoutParams();
float ratio = largo/ancho;
float aux = width/ratio;
params2.leftMargin = (int) (width * ratio) + 20;
surface.xini = 20;
surface.yini = 20;
surface.xend = width * ratio;
surface.yend = height - 220;
}
surface.ini();
surface.update();
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent evento) {
return super.onKeyDown(keyCode, evento);
}
}
而且這是我的面類：
package com.example.grafica;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class MySurface extends SurfaceView implements SurfaceHolder.Callback {
private Paint pincel = new Paint();
private Canvas canvas;
public float xini = 0;
public float yini = 0;
public float xend = 0;
public float yend = 0;
public float coordinatex =(float) 2.50;
public float coordinatety=(float) 1.75;
private SurfaceHolder holder;
public MySurface(Context context, AttributeSet attr) {
super(context,attr);
}
public void ini(){
getHolder().addCallback(this);
}
public void update(){
holder.lockCanvas();
pincel.setColor(Color.BLUE);
pincel.setStrokeWidth(25);
canvas.drawPoint(100, 100, pincel);
holder.unlockCanvasAndPost(canvas);
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
}
@Override
public void surfaceCreated(SurfaceHolder arg0) {
holder = arg0;
canvas = arg0.lockCanvas();
canvas.drawColor(Color.WHITE);
pincel.setColor(Color.BLACK);
pincel.setStrokeWidth(8);
pincel.setStyle(Style.STROKE);
RectF rect = new RectF();
rect.set(xini, yini, xend, yend);
canvas.drawRect(rect, pincel);
pincel.setColor(Color.RED);
pincel.setStrokeWidth(25);
canvas.drawPoint(xini, yend, pincel);
pincel.setColor(Color.BLUE);
pincel.setStrokeWidth(25);
canvas.drawPoint(xend, yend, pincel);
pincel.setColor(Color.GREEN);
pincel.setStrokeWidth(25);
canvas.drawPoint(xini, yini, pincel);
pincel.setColor(Color.YELLOW);
pincel.setStrokeWidth(25);
canvas.drawPoint(xend, yini, pincel);
arg0.unlockCanvasAndPost(canvas);
}
@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
Log.e("surfaceDestroyed ", "Hilo detenido ");
}
@Override
public void onDraw(Canvas canvas) {
}
}
在conclussion，與surface.ini();我打電話SurfaceCreated並繪製了房間，我的想法是，用surface.upddate();代表這個房間的一個點。可以重複使用相同的畫布和支架嗎？怎麼樣？ 我讀了一些關於invalidate（）的函數，可以幫我嗎？如何使用這個功能？ 感謝