add new function : show length of the notes

src/app/build/intermediates/incremental/packageDebug/tmp/debug/dex-renamer-state.txt

@@ -1,4 +1,4 @@
-#Thu Oct 17 22:05:25 CST 2019
+#Fri Oct 18 00:06:03 CST 2019
 base.0=C\:\\Project\\minote\\src\\app\\build\\intermediates\\dex\\debug\\mergeDexDebug\\out\\classes.dex
 path.0=classes.dex
 renamed.0=classes.dex

src/app/src/main/java/net/micode/notes/ui/NoteEditActivity.java

@@ -30,9 +30,11 @@ import android.content.SharedPreferences;
 import android.graphics.Paint;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
+import android.text.Editable;
 import android.text.Spannable;
 import android.text.SpannableString;
 import android.text.TextUtils;
+import android.text.TextWatcher;
 import android.text.format.DateUtils;
 import android.text.style.BackgroundColorSpan;
 import android.util.Log;
@@ -161,6 +163,8 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     //保存便签字符数量
     private int mNoteLength;
 
+    private String mFormateDataTime;
+
     //记录默认字体大小
     private static final String PREFERENCE_FONT_SIZE = "pref_font_size";
 
@@ -297,7 +301,6 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     }
 
 
-
     @Override
     protected void onResume() {
         super.onResume();
@@ -326,10 +329,12 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         //获取已保存便签的字符数
         mNoteLength = mNoteEditor.getText().toString().length();
 
-        mNoteHeaderHolder.tvModified.setText(DateUtils.formatDateTime(this,
+        mFormateDataTime = DateUtils.formatDateTime(this,
                 mWorkingNote.getModifiedDate(), DateUtils.FORMAT_SHOW_DATE
                         | DateUtils.FORMAT_NUMERIC_DATE | DateUtils.FORMAT_SHOW_TIME
-                        | DateUtils.FORMAT_SHOW_YEAR)
+                        | DateUtils.FORMAT_SHOW_YEAR);
+
+        mNoteHeaderHolder.tvModified.setText(mFormateDataTime
                 + space_after_title_time +getResources().getString(R.string.note_length) + " : "
                 + mNoteLength);
 
@@ -416,7 +421,34 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         mNoteHeaderHolder.tvAlertDate = (TextView) findViewById(R.id.tv_alert_date);
         mNoteHeaderHolder.ibSetBgColor = (ImageView) findViewById(R.id.btn_set_bg_color);
         mNoteHeaderHolder.ibSetBgColor.setOnClickListener(this);
+        mFormateDataTime = DateUtils.formatDateTime(this,
+                mWorkingNote.getModifiedDate(), DateUtils.FORMAT_SHOW_DATE
+                        | DateUtils.FORMAT_NUMERIC_DATE | DateUtils.FORMAT_SHOW_TIME
+                        | DateUtils.FORMAT_SHOW_YEAR);
         mNoteEditor = (EditText) findViewById(R.id.note_edit_view);
+        mNoteEditor.addTextChangedListener(new TextWatcher() {
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+
+            }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                if(count == 0){
+                    mNoteLength -= before;
+                }else{
+                    mNoteLength += count;
+                }
+                mNoteHeaderHolder.tvModified.setText(mFormateDataTime
+                        + space_after_title_time +getResources().getString(R.string.note_length) + " : "
+                        + mNoteLength);
+            }
+
+            @Override
+            public void afterTextChanged(Editable s) {
+
+            }
+        });
         mNoteLength = mNoteEditor.getText().toString().length();
         mNoteEditorPanel = findViewById(R.id.sv_note_edit);
         mNoteBgColorSelector = findViewById(R.id.note_bg_color_selector);