diff --git a/src/Comment/.gitignore b/src/Comment/.gitignore
new file mode 100644
index 0000000..aa724b7
--- /dev/null
+++ b/src/Comment/.gitignore
@@ -0,0 +1,15 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties
diff --git a/src/Comment/.idea/.gitignore b/src/Comment/.idea/.gitignore
new file mode 100644
index 0000000..eaf91e2
--- /dev/null
+++ b/src/Comment/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/src/Comment/.idea/.name b/src/Comment/.idea/.name
new file mode 100644
index 0000000..b3405b3
--- /dev/null
+++ b/src/Comment/.idea/.name
@@ -0,0 +1 @@
+My Application
\ No newline at end of file
diff --git a/src/Comment/.idea/compiler.xml b/src/Comment/.idea/compiler.xml
new file mode 100644
index 0000000..7d7ec2e
--- /dev/null
+++ b/src/Comment/.idea/compiler.xml
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/src/Comment/.idea/dbnavigator.xml b/src/Comment/.idea/dbnavigator.xml
new file mode 100644
index 0000000..309eda1
--- /dev/null
+++ b/src/Comment/.idea/dbnavigator.xml
@@ -0,0 +1,463 @@
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\ No newline at end of file
diff --git a/src/Comment/.idea/gradle.xml b/src/Comment/.idea/gradle.xml
new file mode 100644
index 0000000..64d29a1
--- /dev/null
+++ b/src/Comment/.idea/gradle.xml
@@ -0,0 +1,20 @@
+
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\ No newline at end of file
diff --git a/src/Comment/.idea/misc.xml b/src/Comment/.idea/misc.xml
new file mode 100644
index 0000000..7063837
--- /dev/null
+++ b/src/Comment/.idea/misc.xml
@@ -0,0 +1,10 @@
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\ No newline at end of file
diff --git a/src/Comment/app/.gitignore b/src/Comment/app/.gitignore
new file mode 100644
index 0000000..42afabf
--- /dev/null
+++ b/src/Comment/app/.gitignore
@@ -0,0 +1 @@
+/build
\ No newline at end of file
diff --git a/src/Comment/app/build.gradle b/src/Comment/app/build.gradle
new file mode 100644
index 0000000..3863ce2
--- /dev/null
+++ b/src/Comment/app/build.gradle
@@ -0,0 +1,44 @@
+plugins {
+ id 'com.android.application'
+}
+
+android {
+ namespace 'com.example.myapplication'
+ compileSdk 33
+
+ defaultConfig {
+ applicationId "com.example.myapplication"
+ minSdk 17
+ targetSdk 33
+ versionCode 1
+ versionName "1.0"
+
+ testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+ }
+
+ buildTypes {
+ release {
+ minifyEnabled false
+ proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+ }
+ }
+ compileOptions {
+ sourceCompatibility JavaVersion.VERSION_1_8
+ targetCompatibility JavaVersion.VERSION_1_8
+ }
+ buildFeatures {
+ viewBinding true
+ }
+}
+
+dependencies {
+// implementation 'org.litepal.android:core:3.2.3'
+ implementation 'androidx.appcompat:appcompat:1.4.1'
+ implementation 'com.google.android.material:material:1.5.0'
+ implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
+ implementation 'androidx.navigation:navigation-fragment:2.4.1'
+ implementation 'androidx.navigation:navigation-ui:2.4.1'
+ testImplementation 'junit:junit:4.13.2'
+ androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+ androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+}
\ No newline at end of file
diff --git a/src/Comment/app/proguard-rules.pro b/src/Comment/app/proguard-rules.pro
new file mode 100644
index 0000000..481bb43
--- /dev/null
+++ b/src/Comment/app/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+# http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+# public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file
diff --git a/src/Comment/app/src/androidTest/java/com/example/myapplication/ExampleInstrumentedTest.java b/src/Comment/app/src/androidTest/java/com/example/myapplication/ExampleInstrumentedTest.java
new file mode 100644
index 0000000..982ba51
--- /dev/null
+++ b/src/Comment/app/src/androidTest/java/com/example/myapplication/ExampleInstrumentedTest.java
@@ -0,0 +1,26 @@
+package com.example.myapplication;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see Testing documentation
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+ @Test
+ public void useAppContext() {
+ // Context of the app under test.
+ Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+ assertEquals("com.example.myapplication", appContext.getPackageName());
+ }
+}
\ No newline at end of file
diff --git a/src/Comment/app/src/main/AndroidManifest.xml b/src/Comment/app/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..4075db8
--- /dev/null
+++ b/src/Comment/app/src/main/AndroidManifest.xml
@@ -0,0 +1,32 @@
+
+
+
+
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+
\ No newline at end of file
diff --git a/src/Comment/app/src/main/java/com/example/myapplication/AdapterComment.java b/src/Comment/app/src/main/java/com/example/myapplication/AdapterComment.java
new file mode 100644
index 0000000..8bf6feb
--- /dev/null
+++ b/src/Comment/app/src/main/java/com/example/myapplication/AdapterComment.java
@@ -0,0 +1,80 @@
+package com.example.myapplication;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.TextView;
+
+import com.example.myapplication.R;
+import com.example.myapplication.Comment;
+
+import java.util.List;
+
+/**
+ * Created by yyp on 2016/8/10.
+ */
+public class AdapterComment extends BaseAdapter {
+
+ Context context;
+ List data;
+
+ public AdapterComment(Context c, List data){
+ this.context = c;
+ this.data = data;
+ }
+
+ @Override
+ public int getCount() {
+ return data.size();
+ }
+
+ @Override
+ public Object getItem(int i) {
+ return data.get(i);
+ }
+
+ @Override
+ public long getItemId(int i) {
+ return i;
+ }
+
+ @Override
+ public View getView(int i, View convertView, ViewGroup viewGroup) {
+ ViewHolder holder;
+ // 重用convertView
+ if(convertView == null){
+ holder = new ViewHolder();
+ convertView = LayoutInflater.from(context).inflate(R.layout.item_comment, null);
+ holder.comment_name = (TextView) convertView.findViewById(R.id.comment_name);
+ holder.comment_content = (TextView) convertView.findViewById(R.id.comment_content);
+
+ convertView.setTag(holder);
+ }else{
+ holder = (ViewHolder) convertView.getTag();
+ }
+ // 适配数据
+ holder.comment_name.setText(data.get(i).getName());
+ holder.comment_content.setText(data.get(i).getContent());
+
+ return convertView;
+ }
+
+ /**
+ * 添加一条评论,刷新列表
+ * @param comment
+ */
+ public void addComment(Comment comment){
+ data.add(comment);
+ notifyDataSetChanged();
+ }
+
+ /**
+ * 静态类，便于GC回收
+ */
+ public static class ViewHolder{
+ TextView comment_name;
+ TextView comment_content;
+ }
+}
diff --git a/src/Comment/app/src/main/java/com/example/myapplication/Comment.java b/src/Comment/app/src/main/java/com/example/myapplication/Comment.java
new file mode 100644
index 0000000..1214c00
--- /dev/null
+++ b/src/Comment/app/src/main/java/com/example/myapplication/Comment.java
@@ -0,0 +1,33 @@
+package com.example.myapplication;
+
+
+public class Comment {
+
+ String name; //评论者
+ String content; //评论内容
+
+ public Comment(){
+
+ }
+
+ public Comment(String name, String content){
+ this.name = name;
+ this.content = content;
+ }
+
+ public String getName() {
+ return name;
+ }
+
+ public void setName(String name) {
+ this.name = name;
+ }
+
+ public String getContent() {
+ return content;
+ }
+
+ public void setContent(String content) {
+ this.content = content;
+ }
+}
\ No newline at end of file
diff --git a/src/Comment/app/src/main/java/com/example/myapplication/FirstFragment.java b/src/Comment/app/src/main/java/com/example/myapplication/FirstFragment.java
new file mode 100644
index 0000000..3c16010
--- /dev/null
+++ b/src/Comment/app/src/main/java/com/example/myapplication/FirstFragment.java
@@ -0,0 +1,47 @@
+package com.example.myapplication;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.navigation.fragment.NavHostFragment;
+
+import com.example.myapplication.databinding.FragmentFirstBinding;
+
+public class FirstFragment extends Fragment {
+
+ private FragmentFirstBinding binding;
+
+ @Override
+ public View onCreateView(
+ LayoutInflater inflater, ViewGroup container,
+ Bundle savedInstanceState
+ ) {
+
+ binding = FragmentFirstBinding.inflate(inflater, container, false);
+ return binding.getRoot();
+
+ }
+
+ public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
+ super.onViewCreated(view, savedInstanceState);
+
+ binding.buttonFirst.setOnClickListener(new View.OnClickListener() {
+ @Override
+ public void onClick(View view) {
+ NavHostFragment.findNavController(FirstFragment.this)
+ .navigate(R.id.action_FirstFragment_to_SecondFragment);
+ }
+ });
+ }
+
+ @Override
+ public void onDestroyView() {
+ super.onDestroyView();
+ binding = null;
+ }
+
+}
\ No newline at end of file
diff --git a/src/Comment/app/src/main/java/com/example/myapplication/MainActivity.java b/src/Comment/app/src/main/java/com/example/myapplication/MainActivity.java
new file mode 100644
index 0000000..dc4d6b6
--- /dev/null
+++ b/src/Comment/app/src/main/java/com/example/myapplication/MainActivity.java
@@ -0,0 +1,121 @@
+package com.example.myapplication;
+
+import android.app.Activity;
+import android.content.Context;
+import android.os.Bundle;
+import android.view.View;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.ListView;
+import android.widget.RelativeLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.example.myapplication.AdapterComment;
+import com.example.myapplication.Comment;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class MainActivity extends Activity implements View.OnClickListener {
+
+ private ImageView comment;
+ private TextView hide_down;
+ private EditText comment_content;
+ private Button comment_send;
+
+ private LinearLayout rl_enroll;
+ private RelativeLayout rl_comment;
+
+ private ListView comment_list;
+ private AdapterComment adapterComment;
+ private List data;
+
+ @Override
+ protected void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+ setContentView(R.layout.activity_main);
+ initView();
+ }
+
+ private void initView() {
+
+ // 初始化评论列表
+ comment_list = (ListView) findViewById(R.id.comment_list);
+ // 初始化数据
+ data = new ArrayList<>();
+ // 初始化适配器
+ adapterComment = new AdapterComment(getApplicationContext(), data);
+ // 为评论列表设置适配器
+ comment_list.setAdapter(adapterComment);
+
+ comment = (ImageView) findViewById(R.id.comment);
+ hide_down = (TextView) findViewById(R.id.hide_down);
+ comment_content = (EditText) findViewById(R.id.comment_content);
+ comment_send = (Button) findViewById(R.id.comment_send);
+
+ rl_enroll = (LinearLayout) findViewById(R.id.rl_enroll);
+ rl_comment = (RelativeLayout) findViewById(R.id.rl_comment);
+
+ setListener();
+ }
+
+ /**
+ * 设置监听
+ */
+ public void setListener(){
+ comment.setOnClickListener(this);
+
+ hide_down.setOnClickListener(this);
+ comment_send.setOnClickListener(this);
+ }
+
+ @Override
+ public void onClick(View v) {
+ switch (v.getId()) {
+ case R.id.comment:
+ // 弹出输入法
+ InputMethodManager imm = (InputMethodManager) getApplicationContext().getSystemService(Context.INPUT_METHOD_SERVICE);
+ imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
+ // 显示评论框
+ rl_enroll.setVisibility(View.GONE);
+ rl_comment.setVisibility(View.VISIBLE);
+ break;
+ case R.id.hide_down:
+ // 隐藏评论框
+ rl_enroll.setVisibility(View.VISIBLE);
+ rl_comment.setVisibility(View.GONE);
+ // 隐藏输入法，然后暂存当前输入框的内容，方便下次使用
+ InputMethodManager im = (InputMethodManager)getApplicationContext().getSystemService(Context.INPUT_METHOD_SERVICE);
+ im.hideSoftInputFromWindow(comment_content.getWindowToken(), 0);
+ break;
+ case R.id.comment_send:
+ sendComment();
+ break;
+ default:
+ break;
+ }
+ }
+
+ /**
+ * 发送评论
+ */
+ public void sendComment(){
+ if(comment_content.getText().toString().equals("")){
+ Toast.makeText(getApplicationContext(), "评论不能为空！", Toast.LENGTH_SHORT).show();
+ }else{
+ // 生成评论数据
+ Comment comment = new Comment();
+ comment.setName("评论者"+(data.size()+1)+"：");
+ comment.setContent(comment_content.getText().toString());
+ adapterComment.addComment(comment);
+ // 发送完，清空输入框
+ comment_content.setText("");
+
+ Toast.makeText(getApplicationContext(), "评论成功！", Toast.LENGTH_SHORT).show();
+ }
+ }
+}
diff --git a/src/Comment/app/src/main/java/com/example/myapplication/SecondFragment.java b/src/Comment/app/src/main/java/com/example/myapplication/SecondFragment.java
new file mode 100644
index 0000000..3d37bd9
--- /dev/null
+++ b/src/Comment/app/src/main/java/com/example/myapplication/SecondFragment.java
@@ -0,0 +1,47 @@
+package com.example.myapplication;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.navigation.fragment.NavHostFragment;
+
+import com.example.myapplication.databinding.FragmentSecondBinding;
+
+public class SecondFragment extends Fragment {
+
+ private FragmentSecondBinding binding;
+
+ @Override
+ public View onCreateView(
+ LayoutInflater inflater, ViewGroup container,
+ Bundle savedInstanceState
+ ) {
+
+ binding = FragmentSecondBinding.inflate(inflater, container, false);
+ return binding.getRoot();
+
+ }
+
+ public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
+ super.onViewCreated(view, savedInstanceState);
+
+ binding.buttonSecond.setOnClickListener(new View.OnClickListener() {
+ @Override
+ public void onClick(View view) {
+ NavHostFragment.findNavController(SecondFragment.this)
+ .navigate(R.id.action_SecondFragment_to_FirstFragment);
+ }
+ });
+ }
+
+ @Override
+ public void onDestroyView() {
+ super.onDestroyView();
+ binding = null;
+ }
+
+}
\ No newline at end of file
diff --git a/src/Comment/app/src/main/res/drawable-v24/ic_launcher_foreground.xml b/src/Comment/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
new file mode 100644
index 0000000..2b068d1
--- /dev/null
+++ b/src/Comment/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
@@ -0,0 +1,30 @@
+
+
+
+
+