如何插入用帆布的形象? [英] How to insert an image with canvas?
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问题描述
我正尝试在Android的帆布插入一个简单的图像与下一个code,但是当我尝试在智能手机来执行,只出现一个白色的屏幕没有图像。
I´m trying to insert a simple image with canvas in Android with the next code, but when i try to execute in the smartphone, only appears a white screen without image.
import android.support.v7.app.ActionBarActivity;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
}
}
class Lienzo extends View {
private Drawable theimage;
public Lienzo(Context context) {
super(context);
Resources res = context.getResources();
theimage = res.getDrawable(R.drawable.ic_launcher);
theimage.setBounds(30, 30, 200, 200);
}
protected void onDraw(Canvas canvas) {
theimage.draw(canvas);
}
}
我敢肯定这是一个愚蠢,但是,what's错在code?
道理很简单,在画布中插入图像。
I´m sure this is a foolishness but, what´s wrong in the code? The idea is simple, insert an image in the canvas.
推荐答案
我找到了答案:
我添加了一个视图(Lienzo)的布局。
回答这个西班牙网站找到。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RelativeLayout layout1 = (RelativeLayout) findViewById(R.id.layout1);
Lienzo image = new Lienzo(this);
layout1.addView(image);
}
感谢泽维尔Falempin,您启发了我。
Thanks Xavier Falempin, you inspired me.
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