安卓图标错误
我从教程网站复制了这段代码，因为我正在尝试学习它。但我在 最后一行出现错误
package com.android.test;
import android.R;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.Spinner;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;
import android.widget.ImageView.ScaleType;
public class Rotate extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LinearLayout linearLayout = new LinearLayout(this);
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon);
，其中写入“.icon”时出现错误。它说：“图标无法解析或不是字段。”
int 宽度 = bitmap.getWidth(); int height = bitmap.getHeight();
矩阵矩阵 = new Matrix(); 矩阵.postRotate(90); 位图旋转Bitmap = Bitmap.createBitmap(位图, 0, 0,宽度， 高度、矩阵、真实）； BitmapDrawable bmd = new BitmapDrawable(rotatedBitmap);
ImageView imageView = new ImageView(this); imageView.setImageDrawable(bmd); imageView.setScaleType(ScaleType.CENTER); LinearLayout.addView(imageView, new LinearLayout.LayoutParams( LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); setContentView(线性布局); } }
I copied this code from a tutorial site because I am trying to learn it. But I am getting an error at
package com.android.test;
import android.R;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.Spinner;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;
import android.widget.ImageView.ScaleType;
public class Rotate extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LinearLayout linearLayout = new LinearLayout(this);
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon);
On this last line, I get an error where ".icon" is written. It says, "icon cannot be resolved or is not a field."
int width = bitmap.getWidth();
int height = bitmap.getHeight();Matrix matrix = new Matrix(); matrix.postRotate(90); Bitmap rotatedBitmap = Bitmap.createBitmap(bitmap, 0, 0,width,
height, matrix, true);
BitmapDrawable bmd = new BitmapDrawable(rotatedBitmap);ImageView imageView = new ImageView(this); imageView.setImageDrawable(bmd); imageView.setScaleType(ScaleType.CENTER); linearLayout.addView(imageView, new LinearLayout.LayoutParams( LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); setContentView(linearLayout); } }
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评论（4）
在您的
import语句中，这意味着它将查找
android.R.drawable.icon，而不是R.drawable.icon>。android.R包含 SDK 中所有资源的 ID。要访问自己的资源，需要去掉using语句，或者手动编写com.your.package.name.R.drawable.iconIn your
importstatements, you haveThat means it'll look in for
android.R.drawable.icon, rathern thanR.drawable.icon.android.Rcontains the IDs to all the assets from the SDK. To access your own assets, you need to remove the using statement, or manually writecom.your.package.name.R.drawable.icon图标有时有效，有时无效。将其更改为“ic_launcher”。这一直有效。这是在“res/drawable-?dpi”下找到的文件名。
它是出现在 Android 设备上的图标。
像这样：
.setIcon(R.drawable.ic_launcher)
Icon some times works and some times it does not. Change it to 'ic_launcher'. This works all the time. This is the file name found under 'res/drawable-?dpi'.
It is the icon that appears on the android device.
Like this:
.setIcon(R.drawable.ic_launcher)
这很可能是因为您的 /res/drawable 文件夹中没有名为 icon.png/icon.bmp/icon.jpg 的图像，
因此，将网站上可能存在的图像复制到该文件夹中，应该没问题。
This is very likely because you don't have a image in your /res/drawable folder called icon.png/icon.bmp/icon.jpg
So, copy the image probably on the site in to that folder and it should be fine.
您必须将名为
icon.png的图像复制到res/drawable目录中。You have to copy an image called
icon.pnginto theres/drawabledirectory.