func: Textnum

src/main/AndroidManifest.xml

@@ -30,6 +30,9 @@
     <uses-permission android:name="android.permission.GET_ACCOUNTS" />
     <uses-permission android:name="android.permission.USE_CREDENTIALS" />
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+
 
     <application
         android:icon="@drawable/icon_app"

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

@@ -35,6 +35,8 @@ import android.text.SpannableString;
 import android.text.TextUtils;
 import android.text.format.DateUtils;
 import android.text.style.BackgroundColorSpan;
+import android.text.Editable;
+import android.text.TextWatcher;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -51,6 +53,9 @@ import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 import android.widget.Toast;
+import android.os.Environment;
+import android.graphics.Bitmap;
+
 
 import net.micode.notes.R;
 import net.micode.notes.data.Notes;
@@ -70,6 +75,11 @@ import java.util.HashSet;
 import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import java.util.Vector;
+import java.io.File;
+import java.io.FileOutputStream;
+
+
 
 
 public class NoteEditActivity extends Activity //NOTE: extends--单继承，但可多重继承 @zhoukexing 2023/12/17 23:29
@@ -131,6 +141,8 @@ public class NoteEditActivity extends Activity //NOTE: extends--单继承，但
 
     private static final String TAG = "NoteEditActivity";
 
+    private static int MAX_REVOKE_TIMES = 10;
+
     private HeadViewHolder mNoteHeaderHolder;
 
     private View mHeadViewPanel;
@@ -160,6 +172,10 @@ public class NoteEditActivity extends Activity //NOTE: extends--单继承，但
     private String mUserQuery;
     private Pattern mPattern;
 
+    // 存储改变的数据
+    private Vector<SpannableString> mHistory = new Vector<SpannableString>(MAX_REVOKE_TIMES);
+    private boolean mIsRvoke;
+
     /*--- 以上是此类中的数据区，以下是方法区 ---*/
 
     /**
@@ -441,6 +457,13 @@ public class NoteEditActivity extends Activity //NOTE: extends--单继承，但
         return true;
     }
 
+    private String textFilter(String oriText){
+        String newText = oriText;
+        newText = newText.replace("\n", "");
+        newText = newText.replace(" ", "");
+        return newText;
+    }
+
     private void initResources() {
          /**
           * @method:  initResources
@@ -460,6 +483,28 @@ public class NoteEditActivity extends Activity //NOTE: extends--单继承，但
         mNoteHeaderHolder.ibSetBgColor = (ImageView) findViewById(R.id.btn_set_bg_color);
         mNoteHeaderHolder.ibSetBgColor.setOnClickListener(this);
         mNoteEditor = (EditText) findViewById(R.id.note_edit_view);
+        mNoteEditor.addTextChangedListener(new TextWatcher() {
+            int currentLength = 0;
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after)
+            {
+                mNoteHeaderHolder.tvTextNum.setVisibility(View.VISIBLE);
+                mNoteHeaderHolder.tvTextNum.setText("长度" + String.valueOf(currentLength));
+            }
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                currentLength = textFilter(mNoteEditor.getText().toString()).length();
+            }
+            @Override
+            public void afterTextChanged(Editable s) {//储存文本更改的编辑
+                if(!mIsRvoke) {
+                    saveHistory();
+                }else {
+                    mIsRvoke = false;
+                }
+                mNoteHeaderHolder.tvTextNum.setText("长度" + String.valueOf(currentLength));
+            }
+        });
         mNoteEditorPanel = findViewById(R.id.sv_note_edit);
         mNoteBgColorSelector = findViewById(R.id.note_bg_color_selector);
         for (int id : sBgSelectorBtnsMap.keySet()) {
@@ -483,6 +528,7 @@ public class NoteEditActivity extends Activity //NOTE: extends--单继承，但
             mFontSizeId = ResourceParser.BG_DEFAULT_FONT_SIZE;
         }
         mEditTextList = (LinearLayout) findViewById(R.id.note_edit_list);
+
     }
 
     @Override
@@ -655,6 +701,10 @@ public class NoteEditActivity extends Activity //NOTE: extends--单继承，但
         } else if (itemId == R.id.menu_top) {
             mWorkingNote.reverseTopState();
             showTopHeader();
+		} else if (itemId == R.id.menu_revoke) {
+            doRevoke();
+		} else if (itemId == R.id.menu_screenshot) {
+            doScreenshot();
         }
         return true;
     }
@@ -1050,4 +1100,86 @@ public class NoteEditActivity extends Activity //NOTE: extends--单继承，但
     private void showToast(int resId, int duration) {
         Toast.makeText(this, resId, duration).show();
     }
+
+     /**
+      * @method      saveHistory
+      * @description 将每次编辑的内容保存在栈中
+      * @date:       2024-01-08 8:56
+      * @author:     郑鲲鹏
+      * @return      void
+      */
+    private void saveHistory() {
+        SpannableString text = new SpannableString(mNoteEditor.getText());
+        if (mHistory.size() >= MAX_REVOKE_TIMES) {
+            mHistory.removeElementAt(0);
+            mHistory.add(text);
+        }
+        else {
+            mHistory.add(text);
+        }
+    }
+
+    /**
+     * @method      doRevoke
+     * @description 该方法实现撤回的操作
+     * @date:       2024-01-08 15:56
+     * @author:     郑鲲鹏
+     * @return      void
+     */
+    private void doRevoke() {
+        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
+        dialog.setTitle(R.string.tips_of_revoke);
+        dialog.setCancelable(true);
+        dialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+            }
+        });
+        mIsRvoke = true;
+        if(mHistory.size() <= 1){
+            dialog.setMessage(R.string.cannot_revoke_anything);
+            dialog.show();
+        }
+        else {
+            mNoteEditor.setText((CharSequence)mHistory.elementAt(mHistory.size() - 2));
+            mHistory.removeElementAt(mHistory.size() - 1);
+        }
+    }
+
+     /**
+      * @method      doScreenshot
+      * @description 该方法实现截取除了导航栏之外的屏幕的功能
+      * @date:       2024-01-17 17:20
+      * @author:     郑鲲鹏
+      * @return
+      */
+    private void doScreenshot() {
+        // 调用 getWindow().getDecorView().getRootView() 获取屏幕的根视图
+        // 使用 getDrawingCache() 获取视图的缓存位图
+        // 2024-01-17 23:22
+        View view = getWindow().getDecorView();
+        view.setDrawingCacheEnabled(true);
+        view.buildDrawingCache();
+        Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache());
+        view.setDrawingCacheEnabled(false);
+        // 保存Bitmap对象至文件中
+        // 2024-01-17 23:21
+        if (bitmap != null) {
+            try {
+                String sdCardPath = Environment.getExternalStorageDirectory().getPath();
+                String filePath = sdCardPath + File.separator + "screenshot.png";
+                File file = new File(filePath);
+                FileOutputStream fos = new FileOutputStream(file);
+                bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
+                fos.flush();
+                fos.close();
+                // showToast(R.string.success_screenshot_saved);
+                Toast.makeText(this, "Successfully saved the screenshot to" + filePath, Toast.LENGTH_LONG).show();
+            } catch (Exception e) {
+                Log.e(TAG, "Take a screenshot error");
+                showToast(R.string.error_screenshot_saved);
+            }
+        }
+    }
+
 } //NOTE: 这一整个文件就是这一个类 @zhoukexing 2023/12/17 23:41

src/main/res/layout/note_edit.xml

@@ -71,6 +71,7 @@
                 android:layout_height="wrap_content"
                 android:layout_gravity="right|center_vertical"
                 android:layout_marginRight="8dip"
+                android:textAppearance="@style/TextAppearanceSecondaryItem" />
                 />
 
             <ImageButton

src/main/res/menu/note_edit.xml

@@ -57,4 +57,12 @@
     <item
         android:id="@+id/menu_top"
         android:title="@string/menu_top" />
+
+    <item
+        android:id="@+id/menu_revoke"
+        android:title="@string/menu_revoke" />
+
+    <item
+        android:id="@+id/menu_screenshot"
+        android:title="@string/menu_screenshot" />
 </menu>

src/main/res/values/strings.xml

@@ -68,6 +68,10 @@
     <string name="menu_share">Share</string>
     <string name="menu_send_to_desktop">Send to home</string>
     <string name="menu_alert">Remind me</string>
+    <string name="menu_revoke" translatable="false">Revoke text</string>
+    <string name="tips_of_revoke" translatable="false">Tip</string>
+    <string name="cannot_revoke_anything" translatable="false">You cannot revoke anything</string>
+    <string name="menu_screenshot" translatable="false">Screenshot</string>
     <string name="menu_remove_remind">Delete reminder</string>
     <string name="menu_title_select_folder">Select folder</string>
     <string name="menu_move_parent_folder">Parent folder</string>
@@ -87,6 +91,8 @@
     <string name="error_note_not_exist">The note is not exist</string>
     <string name="error_note_empty_for_clock">Sorry, can not set clock on empty note</string>
     <string name="error_note_empty_for_send_to_desktop">Sorry, can not send and empty note to home</string>
+    <string name="success_screenshot_saved" translatable="false">"Successfully saved the screenshot</string>
+    <string name="error_screenshot_saved" translatable="false">Failed to save screenshot</string>
     <string name="success_sdcard_export">Export successful</string>
     <string name="failed_sdcard_export">Export fail</string>
     <string name="format_exported_file_location">Export text file (%1$s) to SD (%2$s) directory</string>