編集履歴

質問編集履歴

文言修正

2018/03/24 12:58

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rick

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@@ -12,7 +12,7 @@
-（xml内では、RelativeLayout(横)内にImageView、TextView、TextView、LinearLayoutを定義し、LinearLayout内にボタンを定義しております。
+（item_list.xmlというアイテム用のレイアウトファイルを別途作成し、それをactivity_main.xmlのlistViewに渡しています。
 アプリ一覧のリストは、listViewとArrayAdapterを使用して実装しております。）

item_list.xmlというアイテム用のレイアウトファイルを別途作成

2018/03/24 12:58

投稿

rick

スコア18

test CHANGED Viewed

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@@ -26,270 +26,192 @@
+    @Override
+    protected void onCreate (Bundle bundle) {
+        super.onCreate (bundle);
+        requestWindowFeature (Window.FEATURE_NO_TITLE);
+        setContentView (R.layout.activity_main);
+        // Get installed app info from device.
+        PackageManager packageManager = getPackageManager();
+        final List<ApplicationInfo> installedAppList = packageManager.getInstalledApplications(PackageManager.GET_META_DATA);
+        // Stack data to list.
+        final List<AppData> appList = new ArrayList<AppData>();
+        for (ApplicationInfo app : installedAppList) {
+            AppData data = new AppData();
+            data.label = app.loadLabel(packageManager).toString();
+            data.icon = app.loadIcon(packageManager);
+            data.name = app.packageName;
+            appList.add (data);
+        }
+        // Show app list to listview.
+        ListView listView = new ListView(this);
+        listView = (ListView) findViewById(R.id.card_list);
+        ViewGroup parentView = (ViewGroup) listView.getParent();
+        if (parentView != null) {
+            parentView.removeView(listView);
+        }
+        listView.setAdapter(new ApplicationListAdapter(this, appList));
+        setContentView(listView);
+}
+        private static class ApplicationListAdapter extends ArrayAdapter<AppData> {
+            //
+            private final LayoutInflater mInflater;
+            public ApplicationListAdapter (Context context, List<AppData> dataList) {
+                //super(context, R.layout.activity_main);
+                super(context, 0);
+                mInflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
+                addAll(dataList);
+            }
+            @Override
+            public View getView (int position, View convertView, ViewGroup parent) {
+                ViewHolder holder = new ViewHolder();
+                if (convertView == null) {
+                    convertView = mInflater.inflate(R.layout.item_list, parent, false);
+                    holder.textLabel = (TextView) convertView.findViewById(R.id.label);
+                    holder.imageIcon = (ImageView) convertView.findViewById(R.id.icon);
+                    holder.packageName = (TextView) convertView.findViewById(R.id.name);
+                    ViewGroup parentView = (ViewGroup) convertView.getParent();
+                    if (parentView != null) {
+                        parentView.removeView(convertView);
+                    }
+                    convertView.setTag(holder);
+                } else {
+                    holder = (ViewHolder) convertView.getTag();
+                }
+                // Get data to show.
+                final AppData data = getItem(position);
+                // Set label & icon to listview.
+                holder.textLabel.setText(data.label);
+                holder.imageIcon.setImageDrawable(data.icon);
+                holder.packageName.setText(data.name);
+                return convertView;
+            }
+        }
 //
-private ArrayList<String> items = null;
+final AppData data = getItem(position);
 //
-private ApplicationListAdapter adapter = null;
-@Override
-protected void onCreate (Bundle bundle) {
-    super.onCreate (bundle);
-    requestWindowFeature (Window.FEATURE_NO_TITLE);
-    setContentView (R.layout.activity_main);
+holder.textLabel.setText(data.label);
+holder.imageIcon.setImageDrawable(data.icon);
+holder.packageName.setText(data.name);
-    // create String Arraylist.
+// private class for storing application data.
-    List<AppData> appList = new ArrayList<AppData>();
-    // create PackageManager.
-    PackageManager packageManager = getPackageManager();
-    // make application list in your device has already installed.
-    final List<ApplicationInfo> installedAppList = packageManager.getInstalledApplications(PackageManager.GET_META_DATA);
-    for (ApplicationInfo app : installedAppList) {
-        AppData data = new AppData();
+private static class AppData {
-        data.label = app.loadLabel(packageManager).toString();
-        data.icon = app.loadIcon(packageManager);
-        data.name = app.packageName;
-        appList.add (data);
+String label;
-    }
-    final ListView listView = new ListView(this);
-    adapter = new ApplicationListAdapter(this, appList);
-    listView.setAdapter(adapter);
+Drawable icon;
-    setContentView(listView);
+String name;
 }
-// private Adapter Class indicates label and icon of application.
+// private class ViewHolder.
-private static class ApplicationListAdapter extends ArrayAdapter<AppData> {
-//
-private final LayoutInflater mInflater;
+private static class ViewHolder {
-public ApplicationListAdapter (Context context, List<AppData> dataList) {
-super(context, R.layout.activity_main);
-mInflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
-addAll(dataList);
+TextView textLabel;
+ImageView imageIcon;
+TextView packageName;
 }
-@Override
-public View getView (int position, View convertView, ViewGroup parent) {
-ViewHolder holder = new ViewHolder();
-if (convertView == null) {
-convertView = mInflater.inflate(R.layout.activity_main, parent, false);
-holder.textLabel = (TextView) convertView.findViewById(R.id.label);
-holder.imageIcon = (ImageView) convertView.findViewById(R.id.icon);
-holder.packageName = (TextView) convertView.findViewById(R.id.name);
-convertView.setTag(holder);
-} else {
-holder = (ViewHolder) convertView.getTag();
-}
-//
-final AppData data = getItem(position);
-//
-holder.textLabel.setText(data.label);
-holder.imageIcon.setImageDrawable(data.icon);
-holder.packageName.setText(data.name);
-return convertView;
-}
-}
-// private Adapter Class indicates label and icon of application.
-private static class ApplicationListAdapter extends ArrayAdapter<AppData> {
-//
-private final LayoutInflater mInflater;
-public ApplicationListAdapter (Context context, List<AppData> dataList) {
-super(context, R.layout.activity_main);
-mInflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
-addAll(dataList);
-}
-@Override
-public View getView (int position, View convertView, ViewGroup parent) {
-ViewHolder holder = new ViewHolder();
-if (convertView == null) {
-convertView = mInflater.inflate(R.layout.activity_main, parent, false);
-holder.textLabel = (TextView) convertView.findViewById(R.id.label);
-holder.imageIcon = (ImageView) convertView.findViewById(R.id.icon);
-holder.packageName = (TextView) convertView.findViewById(R.id.name);
-convertView.setTag(holder);
-} else {
-holder = (ViewHolder) convertView.getTag();
-}
-//
-final AppData data = getItem(position);
-//
-holder.textLabel.setText(data.label);
-holder.imageIcon.setImageDrawable(data.icon);
-holder.packageName.setText(data.name);
-return convertView;
-}
-}
-// private class for storing application data.
-private static class AppData {
-String label;
-Drawable icon;
-String name;
-}
-// private class ViewHolder.
-private static class ViewHolder {
-TextView textLabel;
-ImageView imageIcon;
-TextView packageName;
-}
-// private class for storing application data.
-private static class AppData {
-String label;
-Drawable icon;
-String name;
-}
-// private class ViewHolder.
-private static class ViewHolder {
-TextView textLabel;
-ImageView imageIcon;
-TextView packageName;
-}
 ```
@@ -300,6 +222,54 @@
 <?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="50dp"
+        android:gravity="center"
+        android:text="Button" />
+    <ListView
+        android:id="@+id/card_list"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+    </ListView>
+</LinearLayout>
+```
+item_list.xml
+```
+<?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
@@ -318,11 +288,7 @@
             android:layout_height="50dp"
-            android:layout_alignParentLeft="true"
-            android:layout_alignParentTop="true"
-            android:layout_weight="1"/>
+            android:layout_below="@+id/button" />
@@ -334,15 +300,11 @@
             android:layout_height="wrap_content"
-            android:layout_alignParentRight="true"
-            android:layout_alignParentTop="true"
+            android:layout_below="@+id/button"
             android:layout_toRightOf="@+id/icon"
-            android:textSize="18sp"
+            android:textSize="18sp" />
-            android:layout_weight="1"/>
@@ -356,45 +318,7 @@
             android:layout_alignLeft="@+id/label"
-            android:layout_alignParentRight="true"
-            android:layout_below="@+id/label"
+            android:layout_below="@+id/label" />
-            android:layout_weight="1" />
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="50dp"
-        android:layout_alignParentBottom="true"
-        android:layout_alignParentStart="true"
-        android:orientation="vertical">
-        <Button
-            android:id="@+id/button4"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_alignParentBottom="true"
-            android:layout_alignParentEnd="true"
-            android:layout_weight="1"
-            android:text="Button" />
-    </LinearLayout>

コード体裁修正(```使用)

2018/03/24 12:54

投稿

rick

スコア18

test CHANGED Viewed

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@@ -20,6 +20,8 @@
 ### LancherApp.java
+```
 public class LancherApp extends Activity {
@@ -162,6 +164,78 @@
+// private Adapter Class indicates label and icon of application.
+private static class ApplicationListAdapter extends ArrayAdapter<AppData> {
+//
+private final LayoutInflater mInflater;
+public ApplicationListAdapter (Context context, List<AppData> dataList) {
+super(context, R.layout.activity_main);
+mInflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
+addAll(dataList);
+}
+@Override
+public View getView (int position, View convertView, ViewGroup parent) {
+ViewHolder holder = new ViewHolder();
+if (convertView == null) {
+convertView = mInflater.inflate(R.layout.activity_main, parent, false);
+holder.textLabel = (TextView) convertView.findViewById(R.id.label);
+holder.imageIcon = (ImageView) convertView.findViewById(R.id.icon);
+holder.packageName = (TextView) convertView.findViewById(R.id.name);
+convertView.setTag(holder);
+} else {
+holder = (ViewHolder) convertView.getTag();
+}
+//
+final AppData data = getItem(position);
+//
+holder.textLabel.setText(data.label);
+holder.imageIcon.setImageDrawable(data.icon);
+holder.packageName.setText(data.name);
+return convertView;
+}
+}
 // private class for storing application data.
 private static class AppData {
@@ -190,10 +264,40 @@
+// private class for storing application data.
+private static class AppData {
+String label;
+Drawable icon;
+String name;
+}
+// private class ViewHolder.
+private static class ViewHolder {
+TextView textLabel;
+ImageView imageIcon;
+TextView packageName;
+}
+```
 ### activity_main.xml
+```
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
@@ -295,3 +399,5 @@
 </RelativeLayout>
+```

ApplicationListAdapterのコードが抜けていたため追加

2018/03/23 12:46

投稿

rick

スコア18

test CHANGED Viewed

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@@ -90,6 +90,108 @@
+// private Adapter Class indicates label and icon of application.
+private static class ApplicationListAdapter extends ArrayAdapter<AppData> {
+//
+private final LayoutInflater mInflater;
+public ApplicationListAdapter (Context context, List<AppData> dataList) {
+super(context, R.layout.activity_main);
+mInflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
+addAll(dataList);
+}
+@Override
+public View getView (int position, View convertView, ViewGroup parent) {
+ViewHolder holder = new ViewHolder();
+if (convertView == null) {
+convertView = mInflater.inflate(R.layout.activity_main, parent, false);
+holder.textLabel = (TextView) convertView.findViewById(R.id.label);
+holder.imageIcon = (ImageView) convertView.findViewById(R.id.icon);
+holder.packageName = (TextView) convertView.findViewById(R.id.name);
+convertView.setTag(holder);
+} else {
+holder = (ViewHolder) convertView.getTag();
+}
+//
+final AppData data = getItem(position);
+//
+holder.textLabel.setText(data.label);
+holder.imageIcon.setImageDrawable(data.icon);
+holder.packageName.setText(data.name);
+return convertView;
+}
+}
+// private class for storing application data.
+private static class AppData {
+String label;
+Drawable icon;
+String name;
+}
+// private class ViewHolder.
+private static class ViewHolder {
+TextView textLabel;
+ImageView imageIcon;
+TextView packageName;
+}
 ### activity_main.xml
 <?xml version="1.0" encoding="utf-8"?>