美化，添加功能

.idea/deploymentTargetDropDown.xml

@@ -2,6 +2,9 @@
 <project version="4">
   <component name="deploymentTargetDropDown">
     <value>
+      <entry key="MainActivity">
+        <State />
+      </entry>
       <entry key="app">
         <State />
       </entry>

app/src/main/java/uk/kagurach/android101/MainActivity.java

@@ -6,10 +6,12 @@ import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.view.View;
+import android.widget.Button;
 import android.widget.TextView;
 import android.Manifest;
 
 import androidx.activity.EdgeToEdge;
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.app.ActivityCompat;
 import androidx.core.content.ContextCompat;
@@ -29,33 +31,42 @@ public class MainActivity extends AppCompatActivity {
             v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
             return insets;
         });
-        if (Build.VERSION.SDK_INT >= 33) {
-            if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.POST_NOTIFICATIONS) != PackageManager.PERMISSION_GRANTED) {
-                ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.POST_NOTIFICATIONS}, 101);
-            }
-        }
-
     }
 
     @Override
     protected void onResume(){
         super.onResume();
-    }
 
-    private void goNextPage(){
+        TextView tv = findViewById(R.id.tv_hello);
-        TextView textView = findViewById(R.id.tv_hello);
+        textViewAppendString(tv,"Starting Kagura Init");
-        textView.setText("3秒后进入下个页面");
+        if (Build.VERSION.SDK_INT >= 33) {
-        new Handler().postDelayed(mGoNext,3000);
+            textViewAppendString(tv,"Find api > 33, checking permission");
-    }
+            if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.POST_NOTIFICATIONS) != PackageManager.PERMISSION_GRANTED) {
-
+                textViewAppendString(tv,"Acquiring POST_NOTIFICATIONS");
-    private final Runnable mGoNext = new Runnable() {
+                ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.POST_NOTIFICATIONS}, 101);
-        @Override
+            }
-        public void run() {
+            textViewAppendString(tv,"Check Finished");
-            startActivity(new Intent(MainActivity.this,MainActivity2.class));
         }
-    };
+        textViewAppendString(tv,"*************************\nfinished");
+
+
+        Button button = findViewById(R.id.Page1NextPage);
+        button.setEnabled(true);
+    }
 
     public void jumpToNext(View view) {
-        goNextPage();
+        Button button = findViewById(R.id.Page1NextPage);
+        button.setEnabled(true);
+        Intent myIntent = new Intent(this, MainActivity2.class);
+        startActivity(myIntent);
+    }
+
+    private void textViewAppendString(@NonNull TextView tv, String s){
+        String last = tv.getText().toString();
+        if (!last.endsWith("\n")){
+            last += "\n";
+        }
+        last += s;
+        tv.setText(last);
     }
 }

app/src/main/java/uk/kagurach/android101/MainActivity2.java

@@ -1,11 +1,14 @@
 package uk.kagurach.android101;
 
+import android.content.Context;
 import android.content.Intent;
 import android.graphics.Color;
 import android.os.Bundle;
 import android.util.Log;
 import android.util.TypedValue;
+import android.view.MotionEvent;
 import android.view.View;
+import android.view.inputmethod.InputMethodManager;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.TextView;
@@ -18,6 +21,7 @@ import androidx.core.view.WindowInsetsCompat;
 
 public class MainActivity2 extends AppCompatActivity {
 
+    int _text_size = 70;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -41,17 +45,17 @@ public class MainActivity2 extends AppCompatActivity {
 
     public void set70sp(View view) {
         TextView t = findViewById(R.id.test2strview);
-        t.setTextSize(TypedValue.COMPLEX_UNIT_SP,70);
+        t.setTextSize(TypedValue.COMPLEX_UNIT_SP,_text_size);
     }
 
     public void set70dp(View view) {
         TextView t = findViewById(R.id.test2strview);
-        t.setTextSize(TypedValue.COMPLEX_UNIT_DIP,70);
+        t.setTextSize(TypedValue.COMPLEX_UNIT_DIP,_text_size);
     }
 
     public void set70px(View view) {
         TextView t = findViewById(R.id.test2strview);
-        t.setTextSize(TypedValue.COMPLEX_UNIT_PX,70);
+        t.setTextSize(TypedValue.COMPLEX_UNIT_PX,_text_size);
     }
 
     public void setColor(View view) {
@@ -66,7 +70,10 @@ public class MainActivity2 extends AppCompatActivity {
             _g = Integer.parseInt(g_edit.getText().toString());
             _b = Integer.parseInt(b_edit.getText().toString());
         } catch (NumberFormatException e){
-            Log.e("page2.setcolor",e.toString());
+            NotificationHelper helper =  new NotificationHelper(this);
+            helper.createNotificationChannel();
+            helper.pushNotification("Page 2: Error Setting Color",
+                    e.toString());
             return;
         }
         if (_r>=0&&_g>=0&&_b>=0&&_r<=255&&_g<=255&&_b<=255){
@@ -79,15 +86,53 @@ public class MainActivity2 extends AppCompatActivity {
         }
 
     }
+    public void setText(View view) {
+        TextView textView = findViewById(R.id.test2strview);
+        EditText editText = findViewById(R.id.Page2SetTestText);
+        String s = "Test Text";
+        try {
+            s = editText.getText().toString();
+        }catch (Exception e){
+            NotificationHelper helper =  new NotificationHelper(this);
+            helper.createNotificationChannel();
+            helper.pushNotification("Page 2: Error Setting Test Text",
+                    e.toString());
+            return;
+        }
+        textView.setText(s);
+    }
+
     public void goNext() {
         Intent myIntent = new Intent(this, Page3.class);
         startActivity(myIntent);
-    };
+    }
 
     public void goPrev() {
         Intent myIntent = new Intent(this, MainActivity.class);
         startActivity(myIntent);
-    };
+    }
+
+    public void setSize(View view) {
+        Button sp = findViewById(R.id.Page2SetSP);
+        Button dp = findViewById(R.id.Page2SetDP);
+        Button px = findViewById(R.id.Page2SetPX);
+
+        EditText ed = findViewById(R.id.P2SetTextSize);
+        int size = 70;
+        try {
+            size = Integer.parseInt(ed.getText().toString());
+        }catch (Exception e){
+            NotificationHelper helper =  new NotificationHelper(this);
+            helper.createNotificationChannel();
+            helper.pushNotification("Page 2: Error Setting Text Size",
+                    e.toString());
+            return;
+        }
+        _text_size = size;
+        sp.setText(size +"SP");
+        dp.setText(size +"DP");
+        px.setText(size +"PX");
+    }
 
     final class PageButtonHandler implements View.OnClickListener
     {
@@ -105,5 +150,15 @@ public class MainActivity2 extends AppCompatActivity {
             return false;
         }
     }
+
+    // Fix: hide keyboard
+    @Override
+    public boolean dispatchTouchEvent(MotionEvent ev) {
+        if (getCurrentFocus() != null) {
+            InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+            imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
+        }
+        return super.dispatchTouchEvent(ev);
+    }
 }
 

app/src/main/java/uk/kagurach/android101/NotificationHelper.kt

@@ -15,12 +15,14 @@ class NotificationHelper(_ctx: Context) {
     val CHANNEL_ID = "DBG_PUSHER"
     val name = "Debug Pusher"
     var ctx: Context = _ctx
-    var notifyID = 1;
+    companion object { // Make notify id always increase
-    var rng = Random(114514);
+        var notifyID = 1
+    }
+
     private val notificationManager =
         getSystemService(ctx,NotificationManager::class.java) as NotificationManager
 
-    public fun pushNotification(title:String,content:String) {
+    fun pushNotification(title:String,content:String) {
         val builder = NotificationCompat.Builder(ctx, CHANNEL_ID)
             .setSmallIcon(R.drawable.ic_launcher_foreground)
             .setContentTitle(title)
@@ -39,15 +41,7 @@ class NotificationHelper(_ctx: Context) {
                 return
             }
             notify(notifyID, builder.build())
-            val lastNotifyID = notifyID;
+            notifyID += 1
-            while (notifyID==lastNotifyID){
-                notifyID = rng.nextInt()
-                if (notifyID<=0){
-                    notifyID = -notifyID
-                    notifyID += 1
-                }
-                rng = Random(notifyID)
-            }
         }
     }
 

app/src/main/res/layout/activity_main.xml

@@ -12,22 +12,30 @@
         android:layout_height="match_parent"
         android:orientation="vertical">
 
+        <View
+            android:id="@+id/view"
+            android:layout_width="match_parent"
+            android:layout_height="35dp" />
+
         <TextView
             android:id="@+id/tv_hello"
-            android:layout_width="wrap_content"
+            android:layout_width="match_parent"
-            android:layout_height="344dp"
+            android:layout_height="620dp"
             android:text="@string/hello_world"
-            android:textSize="100sp"
+            android:textSize="15sp"
             android:visibility="visible" />
 
         <Button
-            android:id="@+id/button2"
+            android:id="@+id/Page1NextPage"
             android:layout_width="match_parent"
             android:layout_height="0dp"
             android:layout_weight="1"
             android:text="@string/next_page"
             android:onClick="jumpToNext"
+            android:enabled="false"
             />
 
+
+
     </LinearLayout>
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_main2.xml

@@ -14,52 +14,73 @@
         android:orientation="vertical">
 
 
-        <Button
+        <View
-            android:id="@+id/button5"
+            android:id="@+id/view"
             android:layout_width="match_parent"
-            android:layout_height="67dp"
+            android:layout_height="35dp" />
-            android:text="Button" />
+        <ScrollView
-
-        <TextView
-            android:id="@+id/test2strview"
             android:layout_width="match_parent"
-            android:layout_height="292dp"
+            android:layout_height="350dp">
-            android:text="@string/test_str"
+            <TextView
-            android:textSize="60sp"/>
+                android:id="@+id/test2strview"
-
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="@string/test_str"
+                android:textSize="60sp"/>
+        </ScrollView>
         <LinearLayout
             android:layout_width="match_parent"
-            android:layout_height="153dp"
+            android:layout_height="100dp"
             android:orientation="horizontal">
 
-            <Button
+            <LinearLayout
-                android:id="@+id/button"
+                android:layout_width="80dp"
-                android:layout_width="wrap_content"
                 android:layout_height="match_parent"
-                android:layout_weight="1"
+                android:orientation="vertical">
-                android:onClick="set70sp"
+                <EditText
-                android:text="70sp" />
+                    android:id="@+id/P2SetTextSize"
+                    android:layout_width="80dp"
+                    android:layout_height="0dp"
+                    android:layout_weight="1"
+                    android:ems="10"
+                    android:inputType="number" />
+                <Button
+                    android:id="@+id/Page2SetSize"
+                    android:layout_width="80dp"
+                    android:layout_height="5dp"
+                    android:layout_weight="1"
+                    android:onClick="setSize"
+                    android:text="设置" />
+            </LinearLayout>
 
             <Button
-                android:id="@+id/button3"
+                    android:id="@+id/Page2SetSP"
-                android:layout_width="wrap_content"
+                    android:layout_width="wrap_content"
-                android:layout_height="match_parent"
+                    android:layout_height="match_parent"
-                android:layout_weight="1"
+                    android:layout_weight="1"
-                android:onClick="set70dp"
+                    android:onClick="set70sp"
-                android:text="70dp" />
+                    android:text="70sp" />
 
-            <Button
+                <Button
-                android:id="@+id/button4"
+                    android:id="@+id/Page2SetDP"
-                android:layout_width="wrap_content"
+                    android:layout_width="wrap_content"
-                android:layout_height="match_parent"
+                    android:layout_height="match_parent"
-                android:layout_weight="1"
+                    android:layout_weight="1"
-                android:onClick="set70px"
+                    android:onClick="set70dp"
-                android:text="70px" />
+                    android:text="70dp" />
+
+                <Button
+                    android:id="@+id/Page2SetPX"
+                    android:layout_width="wrap_content"
+                    android:layout_height="match_parent"
+                    android:layout_weight="1"
+                    android:onClick="set70px"
+                    android:text="70px" />
         </LinearLayout>
 
         <LinearLayout
             android:layout_width="match_parent"
-            android:layout_height="83dp"
+            android:layout_height="70dp"
             android:orientation="horizontal">
 
             <EditText
@@ -87,13 +108,37 @@
                 android:inputType="number" />
         </LinearLayout>
 
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="100dp"
+            android:orientation="horizontal">
+            <EditText
+                android:id="@+id/Page2SetTestText"
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:ems="10"
+                android:inputType="text" />
+
+            <Button
+                android:id="@+id/Page2SetTestTextButton"
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:text="@string/setText"
+                android:onClick="setText"
+                />
+
+
+        </LinearLayout>
+
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:orientation="horizontal">
 
             <Button
-                android:id="@+id/button6"
+                android:id="@+id/Page2SetColor"
                 android:layout_width="wrap_content"
                 android:layout_height="match_parent"
                 android:layout_weight="1"

app/src/main/res/values/strings.xml

@@ -2,7 +2,9 @@
     <string name="app_name">Android101</string>
     <string name="hello_world">你好,世界!</string>
     <string name="next_page">下一页</string>
-    <string name="two_way_page">单击下一页，长桉上一页</string>
+    <string name="two_way_page">单击下一页，长按上一页</string>
     <string name="test_str">测试文本</string>
     <string name="set_color">设置颜色</string>
+    <string name="set">设置</string>
+    <string name="setText">设置文本</string>
 </resources>