Question

eclipse进行Android开发学习时：setImageResource(R.drawable.helloworld) 运行后却显示的是icon

package com.noha.test.HelloWdImg;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ImageView;

public class HelloWdImg extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ImageView HelloWorldImageView = new ImageView(this);
/**Set the ImageView to helloworld.png */
HelloWorldImageView.setImageResource(R.drawable.helloworld);
/**Set the ContentView to the ImageView */
setContentView(HelloWorldImageView);
}
}

运行不报错 但是为什么显示的却是自带的icon.png那个机器人图片？ 而不是我放的helloworld.png
drawable-hdpi drawable-hdpi drawable-mdpi 这三个文件夹里我都放了我新加的helloworld.png 图片啊

小弟分不多 请各位帅哥点拨啊~

Answer 1

不知道你是不是直接把图拖到drawable的文件夹，如果你用eclipse，你需要import图片到文件夹，然後可能需要重新clean一下以生成新的R文件，这样才能在R文件注册这个资源。

Answer 2

你把代码改成这样试试

package com.noha.test.HelloWdImg;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ImageView;

public class HelloWdImg extends Activity {

LinearLayout mLinearLayout;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

// Create a LinearLayout in which to add the ImageView
mLinearLayout = new LinearLayout(this);

ImageView HelloWorldImageView = new ImageView(this);
/**Set the ImageView to helloworld.png */
HelloWorldImageView.setImageResource(R.drawable.helloworld);
HelloWorldImageView.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
/**Set the ContentView to the ImageView */
mLinearLayout.addView(HelloWorldImageView);
setContentView(mLinearLayout);
}
}

Answer 3

LinearLayout mLinearLayout;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

// Create a LinearLayout in which to add the ImageView
mLinearLayout = new LinearLayout(this);

ImageView HelloWorldImageView = new ImageView(this);
/**Set the ImageView to helloworld.png */
HelloWorldImageView.setImageResource(R.drawable.helloworld);
}
}

这样应该可以

Answer 4

换一个分辨率试一下

Answer 5

我试了一下可以啊，会不会是你的图片不好？换一张试试。