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我已經創建了一個自定義的XML佈局,並且試圖將地圖背景和典當玩家(位圖)繪製在其上。我想知道如何在我的XML佈局上使用畫布繪製
取而代之的是,它在白色背景上繪製了棋子播放器,而沒有將背景放在XML文件中的地圖背景。
MyViev Class:
package com.example.alpha;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.View;
public class MyView extends View {
Bitmap playerW;
float changingY;
float changingX;
public MyView(Context context) {
super(context);
playerW = BitmapFactory
.decodeResource(getResources(), R.drawable.black);
changingY=0;
// TODO Auto-generated constructor stub
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
canvas.drawBitmap(playerW,4+changingX, (canvas.getHeight())-288-changingY, null);
}
public MyView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
// TODO Auto-generated constructor stub
}
public MyView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
}
my MainActivity Class:
package com.example.alpha;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
public class MainActivity extends ActionBarActivity {
MyView ourView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ourView = new MyView(this);
setContentView(ourView);
}
}
My XML file:
<?xml version="1.0" encoding="utf-8"?>
<view class="com.example.alpha.MyView"
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/myView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/mapeasy"
/>