有人可以帮我一个代码从我的图纸文件夹中随机显示图片吗?我是新来的Java,所以我不知道如何去做。 任何帮助将不胜感激。 我的要求是: - 1.显示随机图像(图像应更改每个启动) 2.that的所有如何在图像视图上显示随机图像
import java.util.Random;
import java.util.Random;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
public class MainMenu extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_menu);
}
public void openNewActivity(View view) {
Intent intent = new Intent(this,MainActivity.class);
startActivity(intent);//button to open main
}
public void browser(View view) {
Intent intent = new Intent(this,Browser.class);
startActivity(intent);//button to open browser
}
final Random rnd = new Random();
{
setContentView(R.layout.activity_main_menu);
final ImageView img = (ImageView) findViewById(R.id.imgRandom);
// I have 3 images named img_0 to img_2, so...
final String str = "img_" + rnd.nextInt(9);
img.setImageDrawable
(
getResources().getDrawable(getResourceID(str, "drawable",
getApplicationContext()))
);
}
protected final static int getResourceID
(final String resName, final String resType, final Context ctx)
{
final int ResourceID =
ctx.getResources().getIdentifier(resName, resType,
ctx.getApplicationInfo().packageName);
if (ResourceID == 0)
{
throw new IllegalArgumentException
(
"No resource string found with name " + resName
);
}
else
{
return ResourceID;
}
}
}
如果我有10张图片,我应该将它设置为9吗? – Anonymous
是的,完美的。第一个是0,最后一个是9 –
你的代码使我的应用程序的力量接近! – Anonymous