weex android 选择文件 拍照 获得uri 并转为文件真实路径 转base64码 回传weex
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public class findModule extends WXModule {
/**
* 打开本地文件器
*/
JSCallback callback;@JSMethod(uiThread = true)
public void openPdf(final JSCallback callback) {
openFileSelector();
findModule.this.callback = callback;
}public void openFileSelector() {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("*/*");//设置类型，我这里是任意类型，任意后缀的可以这样写。
// intent.setType("application/pdf");
intent.addCategory(Intent.CATEGORY_OPENABLE);
((Activity) (mWXSDKInstance.getContext())).startActivityForResult(intent, 0);
}@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 0 && resultCode == Activity.RESULT_OK) {
Uri url = data.getData();
// String[] filePathColumns = {MediaStore.Images.Media.DATA};
// Cursor c = mWXSDKInstance.getContext().getContentResolver().query(url, null, null, null, null);
// c.moveToFirst();
// System.out.println(c );
// String v_file = c.getString(0);// 图片文件路径
// String v_path = c.getString(1);
// String v_size = c.getString(2); // 图片大小
// String v_name = c.getString(3); // 图片文件名
// String v_other = c.getString(4); // 图片文件名
// String picturePath = c.getString(columnIndex);
// c.close();
// 红色部分 这里是安卓系统4.4之前 uri 转 文件路径的老方法
// -------------------------- 这里很重要 -------------------------------------
String v_path = getPathByUri4kitkat(mWXSDKInstance.getContext(),url);
// -------------------------- 这里很重要 -------------------------------------
// getPathByUri4kitkat 这个方法 适合4.4 系统后 uri 转file路径System.out.println(v_path );
onResult(v_path);
}
}
// -------------------------- 结果回调 -------------------------------------
public void onResult(String url ) {
if (url== null)
return;System.out.println(url);
File file = new File(url);
String base64= fileToBase64(file);
System.out.println(base64);
HashMap m = new HashMap();
m.put("path", "sdcard:" + base64);
callback.invoke(m);
}
// -------------------------- file 文件路径转base64码 -------------------------------------
private String fileBase64String(String path) {
try {
FileInputStream fis = new FileInputStream(path);//转换成输入流
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int count = 0;
while ((count = fis.read(buffer)) >= 0) {
baos.write(buffer, 0, count);//读取输入流并写入输出字节流中
}
fis.close();//关闭文件输入流
String uploadBuffer = new String(Base64.encodeToString(baos.toByteArray(), Base64.DEFAULT)); //进行Base64编码
return uploadBuffer;
} catch (Exception e) {
return null;
}
}/**
* 文件转base64字符串
*
* @param file
* @return
*/
public String fileToBase64(File file) {
String base64 = null;
InputStream in = null;
try {
in = new FileInputStream(file);
byte[] bytes = new byte[in.available()];
int length = in.read(bytes);
base64 = Base64.encodeToString(bytes, 0, length, Base64.DEFAULT);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
if (in != null) {
in.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return base64;
}
// -------------- 重点部分的函数 uri 转 file 真实路径 ----------------------------------
//获得路径长什么样子呢
// 示列
// /storage/emulated/0/Pictures/image-13fc2022-4a2c-45be-a79a-976a9812919e4449211495266290891.jpg
// 专为Android4.4设计的从Uri获取文件绝对路径，以前的方法已不好使
@SuppressLint("NewApi")
public String getPathByUri4kitkat(final Context context, final Uri uri) {
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
if (isExternalStorageDocument(uri)) {// ExternalStorageProvider
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
}
} else if (isDownloadsDocument(uri)) {// DownloadsProvider
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"),
Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
} else if (isMediaDocument(uri)) {// MediaProvider
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[] { split[1] };
return getDataColumn(context, contentUri, selection, selectionArgs);
}
} else if ("content".equalsIgnoreCase(uri.getScheme())) {// MediaStore
// (and
// general)
return getDataColumn(context, uri, null, null);
} else if ("file".equalsIgnoreCase(uri.getScheme())) {// File
return uri.getPath();
}
return null;
}/**
* Get the value of the data column for this Uri. This is useful for
* MediaStore Uris, and other file-based ContentProviders.
*
* @param context
* The context.
* @param uri
* The Uri to query.
* @param selection
* (Optional) Filter used in the query.
* @param selectionArgs
* (Optional) Selection arguments used in the query.
* @return The value of the _data column, which is typically a file path.
*/
public String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = { column };
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
if (cursor != null && cursor.moveToFirst()) {
final int column_index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(column_index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}/**
* @param uri
* The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
//--------------------------------------------------------------------------------
// -----4.4之前的uri 转 file路径方法 高版本转出来路径为nul 本人开始debug 多次搞得怀疑-------------------------------
// public String getPath(final Uri uri) {
// if (null == uri)
// return null;
// final String scheme = uri.getScheme();
// String data = null;
// if (scheme == null)
// data = uri.getPath();
// else if (ContentResolver.SCHEME_FILE.equals(scheme)) {
// data = uri.getPath();
// } else if (ContentResolver.SCHEME_CONTENT.equals(scheme)) {
// Cursor cursor = mWXSDKInstance.getContext().getContentResolver().query(uri, new String[]{MediaStore.Images.ImageColumns.DATA}, null, null, null);
// if (null != cursor) {
// if (cursor.moveToFirst()) {
// int index = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
// if (index > -1) {
// data = cursor.getString(index);
// }
// }
// cursor.close();
// }
// }
// return data;
// }
}
// 下面是我 debug 获得的 data 为null
//检查 自己的模拟器的系统
//发现 系统的级别高 果断 换函数 getPathByUri4kitkat