正文
android访问asset目录下的资源
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android提供了AssetManager来访问asset目录下的资源，
在activity中通过getAssets()获取AssetManager
常用的api如下:
1、列举路径下的资源String[] list(String path)
2、InputStream open(asset目录下的资源路径)
下面是放问asset目录下的图片的代码
package com.example.qunzheng.customerview;import android.app.Activity;
import android.content.res.AssetManager;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;import java.io.IOException;
import java.io.InputStream;public class VisitAssetsResourceActivity extends Activity { private ImageView imageView;
private String[] images = null;
private AssetManager assetManager; private int curImageIndex = 0; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_visit_assets_resource); imageView = (ImageView) findViewById(R.id.image);
assetManager = getAssets();
try {
images = assetManager.list("");
} catch (IOException e) {
e.printStackTrace();
}
} public void viewImage(View view) {
if (curImageIndex >= images.length) {
curImageIndex = 0;
}
/**
* 如果图片资源还没有释放，则释放该资源，防止内存溢出
*/
BitmapDrawable drawable = (BitmapDrawable) imageView.getDrawable();
if (drawable != null && drawable.getBitmap() != null && !drawable.getBitmap().isRecycled()) {
drawable.getBitmap().recycle();
} try {
InputStream assertFile = assetManager.open(images[curImageIndex++]);
imageView.setImageBitmap(BitmapFactory.decodeStream(assertFile));
} catch (IOException e) {
e.printStackTrace();
} }}
