我正在尝试制作演示应用。
将图像从我的s3服务器下载到手机存储卡。
我尝试了演示代码并编写了以下内容。但是一旦我在手机上运行它,app力就会关闭。 任何帮助将不胜感激。
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
File f=null;
try{
File dir= Environment.getExternalStorageDirectory();
f= new File(dir,"test.jpg");
}
catch(Exception e)
{
Toast.makeText(getApplicationContext(), "Exception", Toast.LENGTH_SHORT).show();
}
AWSCredentials creden=new BasicAWSCredentials(accessKey,secretKey);
AmazonS3Client s3Client=new AmazonS3Client(creden);
ObjectMetadata obj= s3Client.getObject(new GetObjectRequest("adj-temp","funflick_1.jpg"),f);
}
答案 0 :(得分:2)
尝试这样可以使用快乐编码
{
String str_FilePathInDevice = "/sdcard/" + "/"
+ "RestoreFolderName" + "/" + "filname.extention";
File file = new File(str_FilePathInDevice);
String str_Path = file.getPath().replace(file.getName(), "");
File filedir = new File(str_Path);
try {
filedir.mkdirs();
} catch (Exception ex1) {
}
S3Object object = s3Client.getObject(new GetObjectRequest(
"BucketName", "keyName"));
BufferedReader reader = new BufferedReader(new InputStreamReader(
object.getObjectContent()));
Writer writer = new OutputStreamWriter(new FileOutputStream(file));
while (true) {
String line = reader.readLine();
if (line == null)
break;
writer.write(line + "\n");
}
writer.flush();
writer.close();
reader.close();
}