Android-获取手机上的图片、视频、音频

public final Cursor query (Uri uri, String[] projection,String selection,String[] selectionArgs, String sortOrder)

Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;//音频

Uri uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;//视频

Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;//图片

String[] projection = {MediaStore.Video.Media._ID,
MediaStore.Video.Media.DISPLAY_NAME,
MediaStore.Video.Media.DATA};

// 只查询jpeg和png的图片,以修改日期的升序（默认）排列。
Cursor mCursor = mContentResolver.query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,  null,
MediaStore.Images.Media.MIME_TYPE + "=? or " + MediaStore.Images.Media.MIME_TYPE + "=?",
new String[]{"image/jpeg", "image/png"},
MediaStore.Images.Media.DATE_MODIFIED);

ContentResolver contentResolver = context.getContentResolver();

Cursor cursor = contentResolver.query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
null,
MediaStore.Audio.Media.DURATION + ">? and "
+ MediaStore.Audio.Media.DISPLAY_NAME + " like ?",
MediaStore.Audio.Media.DEFAULT_SORT_ORDER);

while (cursor.moveToNext()) {

// 歌曲名
String title = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.TITLE));
// 歌手
String singer = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));
// 专辑
String album = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM));
// 长度
long size = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media.SIZE));
// 时长
int duration = cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Media.DURATION));
// 路径
String url = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA));
// 显示的文件名
String _display_name = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME));
// 类型
String mime_type = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.MIME_TYPE));

music = new Music();
music.setAlbum(album);
music.setDuration(duration);
music.setSinger(singer);
music.setSize(size);
music.setTitle(title);
music.setUrl(url);
music.set_display_name(_display_name);
music.setMime_type(mime_type);
list.add(music);

demo如下：

package com.example.administrator.downloadimgdemo;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import android.app.Activity;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class GetAllMsg extends AppCompatActivity {

Button getImage;
Button getVideo;
Button getAudio;
Button getFiles;
TextView myTextView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_get_all);
myTextView = (TextView) this.findViewById(R.id.myTextView);

getAudio = ((Button) this.findViewById(R.id.getAudio));
getAudio.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String[] projection = {MediaStore.Audio.Media._ID,
MediaStore.Audio.Media.DISPLAY_NAME,
MediaStore.Audio.Media.DATA,
MediaStore.Audio.Media.SIZE};
String orderBy = MediaStore.Audio.Media.DISPLAY_NAME;
Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
getContentProvider(uri, projection, orderBy);
}
});

getVideo = ((Button) this.findViewById(R.id.getVideo));
getVideo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String[] projection = {MediaStore.Video.Media._ID,
MediaStore.Video.Media.DISPLAY_NAME,
MediaStore.Video.Media.DATA};
String orderBy = MediaStore.Video.Media.DISPLAY_NAME;
Uri uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
getContentProvider(uri, projection, orderBy);
}
});

getImage = ((Button) this.findViewById(R.id.getImage));
getImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String[] projection = {MediaStore.Images.Media._ID,
MediaStore.Images.Media.DISPLAY_NAME,
MediaStore.Images.Media.DATA};
String orderBy = MediaStore.Images.Media.DISPLAY_NAME;
Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
getContentProvider(uri, projection, orderBy);
}
});

getFiles = ((Button) this.findViewById(R.id.getFiles));
getFiles.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

}
});
}

/**
* 获取ContentProvider
*
* @param projection
* @param orderBy
*/
public void getContentProvider(Uri uri, String[] projection, String orderBy) {
List<HashMap<String, String>> listImage = new ArrayList<HashMap<String, String>>();
Cursor cursor = getContentResolver().query(uri, projection, null, null, orderBy);
if (null == cursor) {
return;
}
while (cursor.moveToNext()) {
HashMap<String, String> map = new HashMap<String, String>();
for (int i = 0; i < projection.length; i++) {
map.put(projection[i], cursor.getString(i));
System.out.println(projection[i] + ":::::::" + cursor.getString(i) + "\n");
}
listImage.add(map);
}
myTextView.setText(listImage.toString());
}

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">

<Button
android:id="@+id/getImage"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Get Image" />

<Button
android:id="@+id/getVideo"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Get Video" />

<Button
android:id="@+id/getAudio"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Get Audio" />

<Button
android:id="@+id/getFiles"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Get Files" />

<TextView
android:id="@+id/myTextView"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>

参考：