获取系统数据库中图片和视屏资源

public void doPic(){
if(Environment.getExternalStorageState().equals(Environment.MEDIA_UNMOUNTED)){
Toast.makeText(this, "暂无外部存储", Toast.LENGTH_LONG).show();
return ;
}
Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
ContentResolver mResolver = this.getContentResolver();

//查询图片,如果需要查询更多的图片类型,可以设置更多的MIME_TYPE
Cursor mCursor = mResolver.query(mImageUri, null,MediaStore.Images.Media.MIME_TYPE+"=? or " +
MediaStore.Images.Media.MIME_TYPE+"=?",
new String[]{"image/jpeg","image/png"}, MediaStore.Images.Media.DATE_MODIFIED);
Log.e("TAG", mCursor.getCount() + "");

while (mCursor.moveToNext()) {
int columnCount = mCursor.getColumnCount();
String[] columnNames = mCursor.getColumnNames();
for(String columnName : columnNames){
LOGALL(mCursor, columnName);
//获取文件路径
String path = mCursor.getString(mCursor.getColumnIndex(MediaStore.Images.Media._ID));
}
}
}
private void LOGALL(Cursor mCursor, String columnName) {
String string = mCursor.getString(mCursor.getColumnIndex(columnName));
Log.e("TAG", "columnName:" + columnName +" = " + string);
}

public void doVedio(){
if(Environment.getExternalStorageState().equals(Environment.MEDIA_UNMOUNTED)){
Toast.makeText(this, "暂无外部存储", Toast.LENGTH_LONG).show();
return ;
}

Uri uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
ContentResolver mResolver = getContentResolver();
//Cursor mCursor = mResolver.query(uri, null, MediaStore.Video.Media.MIME_TYPE + "= ?", new String[]{"vedio/mp4"}, MediaStore.Video.Media.DATE_MODIFIED);
Cursor mCursor = mResolver.query(uri, null, null, null, MediaStore.Video.Media.DATE_MODIFIED);
Log.e("TAG", mCursor.getCount() + "");

while (mCursor.moveToNext()) {
int columnCount = mCursor.getColumnCount();
String[] columnNames = mCursor.getColumnNames();
for(String columnName : columnNames){
LOGALL(mCursor, columnName);
//获取文件路径
}
String path = mCursor.getString(mCursor.getColumnIndex(MediaStore.Video.Media.DATA));
Log.e("TAG", "path:" + path);
}
}