本文示例主要实现了Android获取assets文件夹中的数据并将其写入到SD卡中,该程序实现的步骤主要为:首先读取assets文件夹中的数据库,再将其写入到SD存储卡中。
完整示例代码如下:
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import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import android.content.Context;
/*将assets文件夹下的数据库写入SD卡中
* @author Dave */
public class WriteToSD {
private Context context;
String filePath = android.os.Environment.getExternalStorageDirectory()+ "/weather" ;
public WriteToSD(Context context){
this .context = context;
if (!isExist()){
write();
}
}
private void write(){
InputStream inputStream;
try {
inputStream = context.getResources().getAssets().open( "addressId.db" );
File file = new File(filePath);
if (!file.exists()){
file.mkdirs();
}
FileOutputStream fileOutputStream = new FileOutputStream(filePath + "/database.db" );
byte [] buffer = new byte [ 512 ];
int count = 0 ;
while ((count = inputStream.read(buffer)) > 0 ){
fileOutputStream.write(buffer, 0 ,count);
}
fileOutputStream.flush();
fileOutputStream.close();
inputStream.close();
System.out.println( "success" );
} catch (IOException e) {
e.printStackTrace();
}
}
private boolean isExist(){
File file = new File(filePath + "/database.db" );
if (file.exists()){
return true ;
} else {
return false ;
}
}
}
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