init commit

app/src/main/java/com/example/myapplication/MainActivity.java

@@ -1,40 +1,50 @@
 package com.example.myapplication;
 
-import android.content.Context;
-import android.graphics.Color;
-import android.graphics.Rect;
-import android.util.Log;
-import android.view.View;
-import android.view.ViewGroup;
-import androidx.appcompat.app.AppCompatActivity;
-import android.widget.Button;
 import android.os.Bundle;
+import android.app.Activity;
+import android.view.Menu;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.ArrayAdapter;
+import android.widget.GridView;
+import android.widget.TextView;
+import android.widget.Toast;
 
-public class MainActivity extends AppCompatActivity {
+public class MainActivity extends Activity {
+  GridView gridView;
+  static final String[] numbers = new String[] {
+      "1", "2", "3", "4", "5",
+      "6", "7", "8", "9", "10",};
   @Override
   protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.activity_main);
-    ViewGroup linearLayout = findViewById(R.id.linear_layout);
-    linearLayout.setBackgroundColor(Color.RED);
-    getWindow().getDecorView().post(new Runnable() {
-        @Override
-        public void run() {
-          // TODO your magic code to be run
-          ViewGroup linearLayout = findViewById(R.id.linear_layout);
-          int height = linearLayout.getHeight()     ;
-          int width = linearLayout.getWidth();
-          Log.w("TESTING::", "height: " + height);
-          Rect scrollBounds = new Rect();
-          linearLayout.getHitRect(scrollBounds);
-          Log.w("TESTING::", "scrollBound: " + scrollBounds);
-          final int childCount = linearLayout.getChildCount();
-          for (int i = 0; i < childCount; i++) {
-            final View child = linearLayout.getChildAt(i);
-            boolean isVisible = child.getLocalVisibleRect(scrollBounds);
-            Log.w("TESTING::", "child i: " + i + " isVisible: " + isVisible);
-          }
-        }
+
+    gridView = (GridView) findViewById(R.id.gridView1);
+
+    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
+        android.R.layout.simple_list_item_1, numbers);
+
+    gridView.setAdapter(adapter);
+
+    gridView.setOnItemClickListener(new OnItemClickListener() {
+
+      @Override
+      public void onItemClick(AdapterView<?> parent, View view, int position,long id) {
+        Toast.makeText(getApplicationContext(),((TextView) view).getText(), Toast.LENGTH_LONG).show();
+
+      }
+
+
     });
   }
-}
+
+  @Override
+  public boolean onCreateOptionsMenu(Menu menu) {
+    // Inflate the menu; this adds items to the action bar if it is present.
+    getMenuInflater().inflate(R.menu.activity_main, menu);
+    return true;
+  }
+
+}

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

@@ -1,40 +1,10 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!DOCTYPE RelativeLayout>
-<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:fillViewport="true">
-    <TableLayout
-       xmlns:android="http://schemas.android.com/apk/res/android"
-      android:id="@+id/linear_layout"
-       android:layout_width="match_parent"
-       android:layout_height="match_parent">
-      <TextView
-        android:id="@+id/text_view_id"
-        android:layout_width="157dp"
-        android:layout_height="500dp"
-        android:layout_marginBottom="10dp"
-        android:background="@color/blue"
-        android:text="Hello this is my first"
-        android:textColor="@color/red"
-        android:textSize="100dp" />
-      <TextView
-        android:id="@+id/text_view_id"
-        android:layout_width="157dp"
-        android:layout_height="500dp"
-        android:background="@color/blue"
-        android:textColor="@color/red"
-        android:layout_marginBottom="10dp"
-        android:textSize="100dp"
-        android:text="Hello this is my second" />
-      <TextView
-        android:id="@+id/text_view_id"
-        android:layout_width="157dp"
-        android:layout_height="500dp"
-        android:background="@color/blue"
-        android:textColor="@color/red"
-        android:layout_marginBottom="10dp"
-        android:textSize="100dp"
-        android:text="hello" />
-    </TableLayout>
-</ScrollView>
+<GridView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/gridView1"
+    android:numColumns="3"
+    android:gravity="center"
+    android:columnWidth="50dp"
+    android:stretchMode="columnWidth"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent" >
+
+</GridView>

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

@@ -0,0 +1,8 @@
+<menu xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <item
+        android:id="@+id/menu_settings"
+        android:orderInCategory="100"
+        android:title="@string/menu_settings"/>
+
+</menu>

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

@@ -5,4 +5,4 @@
     <color name="colorAccent">#D81B60</color>
     <color name="red">#FF0000</color>
     <color name="blue">#3333CC</color>
-</resources>
+</resources>

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

@@ -1,3 +1,8 @@
-<resources>
-    <string name="app_name">My Application</string>
-</resources>
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="app_name">gridview</string>
+    <string name="hello_world">Hello world!</string>
+    <string name="menu_settings">Settings</string>
+
+</resources>

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

@@ -1,10 +1,20 @@
-<resources>
-
-    <!-- Base application theme. -->
-    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
-        <!-- Customize your theme here. -->
-        <item name="colorPrimary">@color/colorPrimary</item>
-        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
-        <item name="colorAccent">@color/colorAccent</item>
-    </style>
-</resources>
+<resources>
+
+    <!--
+        Base application theme, dependent on API level. This theme is replaced
+        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
+    -->
+    <style name="AppBaseTheme" parent="android:Theme.Light">
+        <!--
+            Theme customizations available in newer API levels can go in
+            res/values-vXX/styles.xml, while customizations related to
+            backward-compatibility can go here.
+        -->
+    </style>
+
+    <!-- Application theme. -->
+    <style name="AppTheme" parent="AppBaseTheme">
+        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
+    </style>
+
+</resources>

build.gradle

@@ -7,7 +7,7 @@ buildscript {
 
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.3'
+        classpath 'com.android.tools.build:gradle:7.0.4'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-all.zip