我正在製作一個android應用程序來測試自己。我正在嘗試使用畫布繪製位圖圖像,但爲什麼它不起作用?它只是在啓動後一秒鐘關閉,沒有任何例外。在android中繪製位圖
這是我使用至今代碼:
package com.mysoftwaremobileapps.BitmapExample;
import java.util.ArrayList;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.MotionEvent;
public class BitmapExampleActivity extends Activity {
/** Called when the activity is first created. */
private ArrayList<CustomImageViewActivity> CustomImages;
Bitmap ImageView1;
float x;
float y;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Canvas c = new Canvas();
drawImage(c);
}
public void doDraw(Canvas canvas)
{
for (CustomImageViewActivity p: CustomImages) {
canvas.drawBitmap(ImageView1, p.getX(), p.getY(), null);
}
}
public void drawImage(Canvas canvas)
{
ImageView1 = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
Paint black;
black = new Paint();
black.setStyle(Paint.Style.FILL);
black.setColor(Color.GRAY);
canvas.drawRect(0, 0, canvas.getWidth(), canvas.getHeight(), black);
canvas.drawBitmap(ImageView1, null, null);
//Parachuter nr.1
x = 14;
y = 28;
CustomImageViewActivity p = new CustomImageViewActivity(x, y);
CustomImages.add(p);
Canvas c1 = new Canvas();
doDraw(c1);
}
public boolean onTouchEvent(MotionEvent event)
{
if (event.getAction() == MotionEvent.ACTION_DOWN) {
for (CustomImageViewActivity p: CustomImages) {
p.posX = event.getX();
p.posY = event.getY();
}
}
return false;
}
}
'帆布C = NULL; doDraw(C);'你逝去的空 – 2012-04-02 16:17:56
所有這些工作,謝謝! – user1183066 2012-04-02 19:19:46