Assets里面文件读取

/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the “License”);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an “AS IS” BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package android.content;

import android.content.res.AssetManager;
import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.SmallTest;

import java.io.IOException;
import java.io.InputStream;

public class AssetTest extends AndroidTestCase {
private AssetManager mAssets;

@Override
protected void setUp() throws Exception {
super.setUp();
mAssets = mContext.getAssets();
}

public static void verifyTextAsset(InputStream is) throws IOException {
String expectedString = “OneTwoThreeFourFiveSixSevenEightNineTen”;
byte[] buffer = new byte[10];

int readCount;
int curIndex = 0;
while ((readCount = is.read(buffer, 0, buffer.length)) > 0) {
for (int i = 0; i < readCount; i++) {
assertEquals(“At index ” + curIndex
+ ” expected ” + expectedString.charAt(curIndex)
+ ” but found ” + ((char) buffer[i]),
buffer[i], expectedString.charAt(curIndex));
curIndex++;
}
}

readCount = is.read(buffer, 0, buffer.length);
assertEquals(“Reading end of buffer: expected readCount=-1 but got ” + readCount,
-1, readCount);

readCount = is.read(buffer, buffer.length, 0);
assertEquals(“Reading end of buffer length 0: expected readCount=0 but got ” + readCount,
0, readCount);

is.close();
}

@SmallTest
public void testReadToEnd() throws Exception {
InputStream is = mAssets.open(“text.txt”);
verifyTextAsset(is);
}

// XXX failing
public void xxtestListDir() throws Exception {
String[] files = mAssets.list(“”);
assertEquals(1, files.length);
assertEquals(“test.txt”, files[0]);
}
}