android开发笔记之获取音频、视频、图片信息
android中的数据（音频，视频，图片），这是大家经常打交道的东西，正好，我碰到了视频数据读写的内容，就把这三个方面的内容，总结一下。特别声明，参考了下面网站的代码，觉得非常的赞，非常的膜拜。
(1)音频内容
音频内容db数据的位置：(data.data.com.android.providers.media.databases.external.db----audio)
音频内容URL: MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
(2)视频内容
视频内容db数据的位置：data.data.com.android.providers.media.databases.external.db-----video
视频内容URL: MediaStore.Video.Media.EXTERNAL_CONTENT_URI
(3)图片内容
图片内容db数据的位置：data.data.com.android.providers.media.databases.external.db-----images
图片内容URL: MediaStore.Images.Media.EXTERNAL_CONTENT_URI
一个综合的样例（非常棒）：
MediaStore提供了音频、视频、图片信息，我们可以通过ContentResolver进行读取。
首先给出了Audio,Video和Image三个类，然后分别定义了三个Provider:AudioProvider,VideoProvider,ImageProvider，貌似用到了工厂方法模式:D，最后给出了一个示例类Provider。
package com.provider;
public class Audio {
private int id;
private String title;
private String album;
private String artist;
private String path;
private String displayName;
private String mimeType;
private long duration;
private long size;
/**
*
*/
public Audio() {
super();
}
/**
* @param id
* @param title
* @param album
* @param artist
* @param path
* @param displayName
* @param mimeType
* @param duration
* @param size
*/
public Audio(int id, String title, String album, String artist,
String path, String displayName, String mimeType, long duration,
long size) {
super();
this.id = id;
this.title = title;
this.album = album;
this.artist = artist;
this.path = path;
this.displayName = displayName;
this.mimeType = mimeType;
this.duration = duration;
this.size = size;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getAlbum() {
return album;
}
public void setAlbum(String album) {
this.album = album;
}
public String getArtist() {
return artist;
}
public void setArtist(String artist) {
this.artist = artist;
}
public String getPath() {
return path;
}
public void setPath(String path) {
this.path = path;
}
public String getDisplayName() {
return displayName;
}
public void setDisplayName(String displayName) {
this.displayName = displayName;
}
public String getMimeType() {
return mimeType;
}
public void setMimeType(String mimeType) {
this.mimeType = mimeType;
}
public long getDuration() {
return duration;
}
public void setDuration(long duration) {
this.duration = duration;
}
public long getSize() {
return size;
}
public void setSize(long size) {
this.size = size;
}
}
package com.provider;
public class Video {
private int id;
private String title;
private String album;
private String artist;
private String displayName;
private String mimeType;
private String path;
private long size;
private long duration;
/**
*
*/
public Video() {
super();
}
/**
* @param id
* @param title
* @param album
* @param artist
* @param displayName
* @param mimeType
* @param data
* @param size
* @param duration
*/
public Video(int id, String title, String album, String artist,
String displayName, String mimeType, String path, long size,
long duration) {
super();
this.id = id;
this.title = title;
this.album = album;
this.artist = artist;
this.displayName = displayName;
this.mimeType = mimeType;
this.path = path;
this.size = size;
this.duration = duration;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getAlbum() {
return album;
}
public void setAlbum(String album) {
this.album = album;
}
public String getArtist() {
return artist;
}
public void setArtist(String artist) {
this.artist = artist;
}
public String getDisplayName() {
return displayName;
}
public void setDisplayName(String displayName) {
this.displayName = displayName;
}
public String getMimeType() {
return mimeType;
}
public void setMimeType(String mimeType) {
this.mimeType = mimeType;
}
public String getPath() {
return path;
}
public void setPath(String path) {
this.path = path;
}
public long getSize() {
return size;
}
public void setSize(long size) {
this.size = size;
}
public long getDuration() {
return duration;
}
public void setDuration(long duration) {
this.duration = duration;
}
}
package com.provider;
public class Image {
private int id;
private String title;
private String displayName;
private String mimeType;
private String path;
private long size;
public Image() {
super();
}
/**
* @param id
* @param title
* @param displayName
* @param mimeType
* @param path
* @param size
*/
public Image(int id, String title, String displayName, String mimeType,
String path, long size) {
super();
this.id = id;
this.title = title;
this.displayName = displayName;
this.mimeType = mimeType;
this.path = path;
this.size = size;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDisplayName() {
return displayName;
}
public void setDisplayName(String displayName) {
this.displayName = displayName;
}
public String getMimeType() {
return mimeType;
}
public void setMimeType(String mimeType) {
this.mimeType = mimeType;
}
public String getPath() {
return path;
}
public void setPath(String path) {
this.path = path;
}
public long getSize() {
return size;
}
public void setSize(long size) {
this.size = size;
}
}
package com.provider;
import java.util.List;
public interface AbstructProvider {
public List<?> getList();
}
package com.provider;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.database.Cursor;
import android.provider.MediaStore;
public class AudioProvider implements AbstructProvider {
private Context context;
public AudioProvider(Context context) {
this.context = context;
}
@Override
public List<?> getList() {
List<Audio> list = null;
if (context != null) {
Cursor cursor = context.getContentResolver().query(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null,
null, null);
if (cursor != null) {
list = new ArrayList<Audio>();
while (cursor.moveToNext()) {
int id = cursor.getInt(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media._ID));
String title = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE));
String album = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM));
String artist = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST));
String path = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));
String displayName = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME));
String mimeType = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.MIME_TYPE));
long duration = cursor
.getInt(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION));
long size = cursor
.getLong(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE));
Audio audio = new Audio(id, title, album, artist, path,
displayName, mimeType, duration, size);
list.add(audio);
}
cursor.close();
}
}
return list;
}
}
package com.provider;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.database.Cursor;
import android.provider.MediaStore;
public class VideoProvider implements AbstructProvider {
private Context context;
public VideoProvider(Context context) {
this.context = context;
}
@Override
public List<?> getList() {
List<Video> list = null;
if (context != null) {
Cursor cursor = context.getContentResolver().query(
MediaStore.Video.Media.EXTERNAL_CONTENT_URI, null, null,
null, null);
if (cursor != null) {
list = new ArrayList<Video>();
while (cursor.moveToNext()) {
int id = cursor.getInt(cursor
.getColumnIndexOrThrow(MediaStore.Video.Media._ID));
String title = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Video.Media.TITLE));
String album = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Video.Media.ALBUM));
String artist = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Video.Media.ARTIST));
String displayName = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Video.Media.DISPLAY_NAME));
String mimeType = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Video.Media.MIME_TYPE));
String path = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Video.Media.DATA));
long duration = cursor
.getInt(cursor
.getColumnIndexOrThrow(MediaStore.Video.Media.DURATION));
long size = cursor
.getLong(cursor
.getColumnIndexOrThrow(MediaStore.Video.Media.SIZE));
Video video = new Video(id, title, album, artist, displayName, mimeType, path, size, duration);
list.add(video);
}
cursor.close();
}
}
return list;
}
}
package com.provider;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.database.Cursor;
import android.provider.MediaStore;
public class ImageProvider implements AbstructProvider {
private Context context;
public ImageProvider(Context context) {
this.context = context;
}
@Override
public List<?> getList() {
List<Image> list = null;
if (context != null) {
Cursor cursor = context.getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, null,
null, null);
if (cursor != null) {
list = new ArrayList<Image>();
while (cursor.moveToNext()) {
int id = cursor
.getInt(cursor
.getColumnIndexOrThrow(MediaStore.Images.Media._ID));
String title = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.TITLE));
String path = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA));
String displayName = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DISPLAY_NAME));
String mimeType = cursor
.getString(cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.MIME_TYPE));
long size = cursor
.getLong(cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.SIZE));
Image audio = new Image(id, title, displayName, mimeType,
path, size);
list.add(audio);
}
cursor.close();
}
}
return list;
}
}
package com.provider;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
public class Provider extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// 音频
AbstructProvider provider = new AudioProvider(this);
List<?> list = provider.getList();
// 视频
// AbstructProvider provider = new VideoProvider(this);
// List<?> list = provider.getList();
// 图片
// AbstructProvider provider = new ImageProvider(this);
// List<?> list = provider.getList();
}
}
参考资料：
1.http://www.cnblogs.com/pen-ink/archive/2011/06/02/2068410.html
android获取音频、视频、图片信息