data_SDCard_storage

package com.example.hd.picture_sdcard;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends Activity {
private static final String PATH = "http://pic28.nipic.com/20130329/12243865_163418381104_2.jpg";
private Button mButton;
private ImageView mImageView;
private AsyncTaskService myTask;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mButton = (Button) findViewById(R.id.button1);
mImageView = (ImageView) findViewById(R.id.imageView1);
myTask = new AsyncTaskService(MainActivity.this, mImageView);
mButton.setOnClickListener(new ShowImage());
}

class ShowImage implements View.OnClickListener{

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
myTask.execute(PATH);
}

}

}

package com.example.hd.picture_sdcard;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

public class HttpUtils {

public HttpUtils() {
// TODO Auto-generated constructor stub
}

public byte[] getImage(String path){
byte[] data = null;
byte[] data_temp = null;
InputStream in = null;
ByteArrayOutputStream swapStream = new ByteArrayOutputStream();
int len = 0;
try {
URL url = new URL(path);
HttpURLConnection urlcon = (HttpURLConnection) url.openConnection();
in = new BufferedInputStream(urlcon.getInputStream());
data_temp =new byte[100];
data = new byte[in.available()];
while ((len=in.read(data_temp, 0, 100)) != -1) {
swapStream.write(data_temp);
}
data = swapStream.toByteArray();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
if(data != null){
try {
in.close();
swapStream.close();
return data;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return data;
}

}

package com.example.hd.picture_sdcard;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.widget.ImageView;

public class AsyncTaskService extends AsyncTask<String, Void, byte[]>{
private Context context;
private ImageView imageview;

public AsyncTaskService(Context context,ImageView imageview) {
// TODO Auto-generated constructor stub
this.context=context;
this.imageview = imageview;
}

@Override
protected void onPostExecute(byte[] result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if(result != null){
Bitmap bitmap = BitmapFactory.decodeByteArray(result, 0, result.length);
imageview.setImageBitmap(bitmap);
}else{
imageview.setImageResource(R.drawable.ic_launcher);
}
}

@Override
protected void onProgressUpdate(Void... values) {
// TODO Auto-generated method stub
super.onProgressUpdate(values);
}

@Override
protected byte[] doInBackground(String... params) {
// TODO Auto-generated method stub
HttpUtils http = new HttpUtils();
byte[] data = http.getImage(params[0]);
SdCardService sdcard = new SdCardService();
sdcard.saveFileToSd("mypicture.jpg", data);
return data;
}

}

package com.example.hd.picture_sdcard;

import android.test.AndroidTestCase;
import android.test.AndroidTestRunner;
import android.util.Log;

public class MyTest extends AndroidTestCase{

public MyTest() {
// TODO Auto-generated constructor stub
}

public void saveTest(){
SdCardService sdCard = new SdCardService();
sdCard.saveToSd("dfjdsjkad.txt", "fdsfa".getBytes());
}
public void deleteTest(){
SdCardService sdcard = new SdCardService();
boolean flag = sdcard.delateFile("txt", "jjjj.txt");
Log.i("deleteTest", flag+"");
}
}

package com.example.hd.picture_sdcard;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import android.os.Environment;

public class SdCardService {

public SdCardService() {
// TODO Auto-generated constructor stub
}

public boolean saveToSd(String fileName,byte[] data){
String state = Environment.getExternalStorageState();
File file = Environment.getExternalStorageDirectory();
FileOutputStream outputStream = null;
if(state.equals(Environment.MEDIA_MOUNTED)){
try {
outputStream = new FileOutputStream(new File(file, fileName));
outputStream.write(data, 0, data.length);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
if(outputStream != null){
try {
outputStream.close();
return true;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
return false;
}

public boolean saveFileToSd(String fileName,byte[] data){
String state = Environment.getExternalStorageState();
File file = null;
FileOutputStream outputStream = null;
if(state.equals(Environment.MEDIA_MOUNTED)){
if(fileName.endsWith(".mp3")||fileName.endsWith("rm")){
file = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC);
}else if(fileName.endsWith(".mp4")||fileName.endsWith("avi")){
file = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES);
}else if(fileName.endsWith(".jpg")||fileName.endsWith(".png")){
file = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
}else{
file = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
}
}
try {
outputStream = new FileOutputStream(new File(file, fileName));
outputStream.write(data,0,data.length);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
try {
outputStream.close();
return true;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return false;
}
public boolean delateFile(String folder,String fileName){
String state = Environment.getExternalStorageState();
File file = null;
boolean flag = false;
File sdCardroot;
if(state.equals(Environment.MEDIA_MOUNTED)){
sdCardroot = Environment.getExternalStorageDirectory();
file = new File(sdCardroot.getAbsoluteFile()+"/"+folder+"/"+fileName);
if(file.exists()){
flag = file.delete();
return flag;
}else {
}
}
return false;
}
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.hd.picture_sdcard"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="17"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<instrumentation android:name="android.test.InstrumentationTestRunner" android:targetPackage="com.example.hd.picture_sdcard"></instrumentation>

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<uses-library android:name="android.test.runner"/>
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.hd.picture_sdcard.MainActivity" >

<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_marginBottom="127dp"
android:layout_marginLeft="106dp"
android:text="Button" />

<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="134dp" />

</RelativeLayout>