所以我在这里尝试做的是收集用户的信息，然后收集他/她的签名，然后将其附加到电子邮件中。
String pilot, ship, to, from, zone1, zone2, CallSign, agent, date, imgPath;
Toolbar toolbar;
Button btn_get_sign, mClear, mGetSign, mCancel, btn_send;
double vesselUnit;
Dialog dialog;
File file;
LinearLayout mContent;
View view;
signature mSignature;
Bitmap bitmap;
File fileDIRECTORY = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/extSdCard" + "/DigitalSign");
String DIRECTORY= Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).toString() + "/extSdCard" + "/DigitalSign";
String rootpic_name = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date());
String pic_name = rootpic_name + ".JPEG";
String StoredPath = DIRECTORY + File.separator + rootpic_name + ".JPEG";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_digital_signature);
Bundle extras = getIntent().getExtras();
if (extras != null) {
pilot = extras.getString("Pilot");
ship = extras.getString("ship");
to = extras.getString("to");
from = extras.getString("from");
zone1 = extras.getString("zone1");
zone2 = extras.getString("zone2");
CallSign = extras.getString("callsign");
agent = extras.getString("agent");
vesselUnit = extras.getDouble("vesselunits");
date = extras.getString("date");
}
// Setting ToolBar as ActionBar
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Button to open signature panel
btn_get_sign = (Button) findViewById(R.id.signature);
btn_send= (Button) findViewById(R.id.btn_send);
// Method to create Directory, if the Directory doesn't exists
dialog = new Dialog(this);
// Removing the features of Normal Dialogs
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.dialog_sig);
dialog.setCancelable(true);
btn_get_sign.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Function call for Digital Signature
dialog_action();
}
});
btn_send.setOnClickListener(new OnClickListener() {
public void onClick(View v){
Uri upath = Uri.parse("file://" + StoredPath);
Intent emailIntent = new Intent(Intent.ACTION_SEND);
emailIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
emailIntent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
emailIntent.putExtra(Intent.EXTRA_TEXT, "Pilot: "+pilot+"\nShip: "+ship+"\n"+"Destination: "+to+"\n"+"Departure location: "+from+"\n"+"Zone 1: "+zone1+"\n"+"Zone 2: "+zone2+"\n"+"Callsign: "+CallSign+"\n"+"Angent: "+agent+"\n"+"Vessel Units: "+vesselUnit);
// set the type to 'email'
emailIntent.setType("image/*");
String to[] = {"myemail@gmail.com"};
emailIntent.putExtra(Intent.EXTRA_EMAIL, to);
// the attachment
emailIntent.putExtra(Intent.EXTRA_STREAM, upath);
Log.d("TAG","Tagged");
// the mail subject
emailIntent.putExtra(Intent.EXTRA_SUBJECT, pilot+"'s Ticket for "+ship);
startActivity(Intent.createChooser(emailIntent , "Send email..."));
}
});
}
// Function for Digital Signature
public void dialog_action() {
mContent = (LinearLayout) dialog.findViewById(R.id.linearLayout);
mSignature = new signature(getApplicationContext(), null);
mSignature.setBackgroundColor(Color.WHITE);
// Dynamically generating Layout through java code
mContent.addView(mSignature, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
mClear = (Button) dialog.findViewById(R.id.clear);
mGetSign = (Button) dialog.findViewById(R.id.getsign);
mGetSign.setEnabled(false);
mCancel = (Button) dialog.findViewById(R.id.cancel);
view = mContent;
mClear.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Log.v("tag", "Panel Cleared");
mSignature.clear();
mGetSign.setEnabled(false);
}
});
mGetSign.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Log.v("tag", "Panel Saved");
view.setDrawingCacheEnabled(true);
if(isExternalStorageReadable() && isExternalStorageWritable()) {
file=mSignature.save(view);
dialog.dismiss();
Toast.makeText(getApplicationContext(), "Saved", Toast.LENGTH_SHORT).show();
// Calling the same class
recreate();
}
else{Toast.makeText(getApplicationContext(), "NOT Saved", Toast.LENGTH_SHORT).show();}
}
});
mCancel.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Log.v("tag", "Panel Cancelled");
dialog.dismiss();
// Calling the same class
recreate();
}
});
dialog.show();
}
public class signature extends View {
private static final float STROKE_WIDTH = 5f;
private static final float HALF_STROKE_WIDTH = STROKE_WIDTH / 2;
private Paint paint = new Paint();
private Path path = new Path();
private float lastTouchX;
private float lastTouchY;
private final RectF dirtyRect = new RectF();
public signature(Context context, AttributeSet attrs) {
super(context, attrs);
paint.setAntiAlias(true);
paint.setColor(Color.BLACK);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeJoin(Paint.Join.ROUND);
paint.setStrokeWidth(STROKE_WIDTH);
}
public File save(View v) {
Log.v("tag", "Width: " + v.getWidth());
Log.v("tag", "Height: " + v.getHeight());
if (bitmap == null) {
bitmap = Bitmap.createBitmap(mContent.getWidth(), mContent.getHeight(), Bitmap.Config.RGB_565);
}
Canvas canvas = new Canvas(bitmap);
fileDIRECTORY.mkdirs();
File nfile = new File (fileDIRECTORY,pic_name);
try {
// Output the file
FileOutputStream mFileOutStream = new FileOutputStream(nfile);
v.draw(canvas);
// Convert the output file to Image such as .png
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, mFileOutStream);
mFileOutStream.flush();
mFileOutStream.close();
MediaScannerConnection.scanFile(getApplicationContext(), new String[] { nfile.toString() }, null,
new MediaScannerConnection.OnScanCompletedListener() {
public void onScanCompleted(String path, Uri uri) {
Log.i("ExternalStorage", "Scanned " + path + ":");
Log.i("ExternalStorage", "-> uri=" + uri);
}
});
} catch (Exception e) {
e.printStackTrace();
}
return nfile;
}
public void clear() {
path.reset();
invalidate();
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawPath(path, paint);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
float eventX = event.getX();
float eventY = event.getY();
mGetSign.setEnabled(true);
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
path.moveTo(eventX, eventY);
lastTouchX = eventX;
lastTouchY = eventY;
return true;
case MotionEvent.ACTION_MOVE:
case MotionEvent.ACTION_UP:
resetDirtyRect(eventX, eventY);
int historySize = event.getHistorySize();
for (int i = 0; i < historySize; i++) {
float historicalX = event.getHistoricalX(i);
float historicalY = event.getHistoricalY(i);
expandDirtyRect(historicalX, historicalY);
path.lineTo(historicalX, historicalY);
}
path.lineTo(eventX, eventY);
break;
default:
debug("Ignored touch event: " + event.toString());
return false;
}
invalidate((int) (dirtyRect.left - HALF_STROKE_WIDTH),
(int) (dirtyRect.top - HALF_STROKE_WIDTH),
(int) (dirtyRect.right + HALF_STROKE_WIDTH),
(int) (dirtyRect.bottom + HALF_STROKE_WIDTH));
lastTouchX = eventX;
lastTouchY = eventY;
return true;
}
private void debug(String string) {
Log.v("log_tag", string);
}
private void expandDirtyRect(float historicalX, float historicalY) {
if (historicalX < dirtyRect.left) {
dirtyRect.left = historicalX;
} else if (historicalX > dirtyRect.right) {
dirtyRect.right = historicalX;
}
if (historicalY < dirtyRect.top) {
dirtyRect.top = historicalY;
} else if (historicalY > dirtyRect.bottom) {
dirtyRect.bottom = historicalY;
}
}
private void resetDirtyRect(float eventX, float eventY) {
dirtyRect.left = Math.min(lastTouchX, eventX);
dirtyRect.right = Math.max(lastTouchX, eventX);
dirtyRect.top = Math.min(lastTouchY, eventY);
dirtyRect.bottom = Math.max(lastTouchY, eventY);
}
}
/* Checks if external storage is available for read and write */
public boolean isExternalStorageWritable() {
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state))
{
Log.d("TRACE","ISWRITEABLE");
return true;
}
return false;
}
/* Checks if external storage is available to at least read */
public boolean isExternalStorageReadable() {
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state) || Environment.MEDIA_MOUNTED_READ_ONLY.equals(state))
{
Log.d("TRACE","ISREADABLE");
return true;
}
return false;
}
public static void addImageToGallery(final String filePath, final Context context) {
ContentValues values = new ContentValues();
values.put(Images.Media.DATE_TAKEN, System.currentTimeMillis());
values.put(Images.Media.MIME_TYPE, "image/jpeg");
values.put(MediaStore.MediaColumns.DATA, filePath);
try{
context.getContentResolver().insert(Images.Media.EXTERNAL_CONTENT_URI, values);
}catch(Exception e){
Log.d("TAG","Not Saved in gallery");
}
}
}
所以我创建了目录，但图片没有附加，也没有显示在文件目录中。我没有看到我的问题出现在哪里，但我肯定知道图片未被处理或未在文件中正确保存。
答案 0 :(得分：1)
我建议你先了解android存储模型 当我们在android中讨论内部和外部存储时，有很多困惑。 这主要是因为。
我们想到什么：
我们对外部存储的理解是SD卡，这是不对的。
Android SDK认为：
每个Android兼容设备都支持共享＆＃34;外部存储＆＃34;您可以用来保存文件。这可以是可移动存储介质（例如SD卡）或内部（不可移动）存储。保存到外部存储器的文件是世界可读的，当用户启用USB海量存储器在计算机上传输文件时，可以对其进行修改。
这是一个很好的资源来阅读更多内容 Internal Storage和External Storage
编辑：当您为多个制造商开发应用时，尽量不要硬编码路径，因为它因制造商而异。
答案 1 :(得分：0)
将您的路径目录更改为
File DIRECTORY = new File(Environment.getExternalStorageDirectory()
.getParent() + "/extSdCard" + "/DigitalSign");
记录
/存储/模拟/ extSdCard / DigitalSign