Java-Android-ZIP文件保持带回println需要消息错误
我只是想压缩两个文件。有一个调用Compress类的MainActivity。Compress.zip()方法中的循环似乎正在循环,但就在out.close()之前,它给出了一个错误?这是因为我还没有创建zip文件吗?如果是,我该如何检查 以下是代码:Java-Android-ZIP文件保持带回println需要消息错误,java,android,zip,compression,Java,Android,Zip,Compression,我只是想压缩两个文件。有一个调用Compress类的MainActivity。Compress.zip()方法中的循环似乎正在循环,但就在out.close()之前,它给出了一个错误?这是因为我还没有创建zip文件吗?如果是,我该如何检查 以下是代码: public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) {
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), "MyCameraApp");
if (! mediaStorageDir.exists()){
if (! mediaStorageDir.mkdirs()){
Log.d("MyCameraApp", "failed to create directory");
}
}
String path = mediaStorageDir.getPath() + File.separator;
String zip = path+"images.zip";
String[] files = new String[3];
files[0] = path+"IMG_1.jpg";
files[1] = path+"IMG_2.jpg";
Compress comp = new Compress(files, zip);
comp.zip();
}
}
public class Compress {
private static final int BUFFER = 2048;
private String[] mfiles;
private String mzip;
public Compress(String[] files, String zip){
mfiles = files;
mzip = zip;
}
public void zip(){
try{
BufferedInputStream origin = null;
FileOutputStream dest = new FileOutputStream(mzip);
ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(dest));
byte data[] = new byte[BUFFER];
for(int i=0; i< mfiles.length;i++){
Log.v("Compress", mfiles[i]);
FileInputStream fi = new FileInputStream(mfiles[i]);
origin = new BufferedInputStream(fi, BUFFER);
ZipEntry entry = new ZipEntry(mfiles[i].substring(mfiles[i].lastIndexOf("/")+1));
out.putNextEntry(entry);
int count;
while((count = origin.read(data, 0, BUFFER)) != -1){
out.write(data, 0, count);
}
origin.close();
}
out.close();
}catch(Exception e){
e.printStackTrace();
}
}
}
正如stacktrace所说,println需要一条消息
Log.v("Compress", mfiles[i]);
如果mfiles[i]
为空,则会导致应用程序因该消息而崩溃。换成
Log.v("Compress", mfiles[i] != null ? mfiles[i] : " mfiles at i is null");
我把我的数组设置为3而不是2,我有三个图像,但删除了一个,忘记了调整数组。我没有得到它。能否重新措辞?
String[]files=新字符串[3]代码>应该是String[]files=新字符串[2]代码>在我从列表中删除一个后,我忘记将其更改为2,所以从3链接到2可以解决您的所有问题?是的,您提供了帮助,因为我可以看到其他错误消息
Log.v("Compress", mfiles[i] != null ? mfiles[i] : " mfiles at i is null");