Create a two-tiered menu system.

UnicodeMapActivity is the root activity, which launches
UnicodeListActivity for the desired range.

3 files changed, 83 insertions, 18 deletions

diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index ce77c30..104ba58 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -4,12 +4,12 @@
       android:versionCode="1"
       android:versionName="1.0">
     <application android:label="@string/app_name">
-        <activity android:name=".UnicodeMapActivity"
-                  android:label="@string/app_name">
+        <activity android:name=".UnicodeMapActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity android:name=".UnicodeListActivity" />
     </application>
 </manifest> 
diff --git a/src/org/madore/android/unicodeMap/UnicodeListActivity.java b/src/org/madore/android/unicodeMap/UnicodeListActivity.java
new file mode 100644
index 0000000..8f962f0
--- /dev/null
+++ b/src/org/madore/android/unicodeMap/UnicodeListActivity.java
@@ -0,0 +1,52 @@
+package org.madore.android.unicodeMap;
+
+import java.util.List;
+import java.util.ArrayList;
+import android.content.Context;
+import android.content.Intent;
+import android.content.res.AssetManager;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.*;
+import android.text.ClipboardManager;
+import android.app.ListActivity;
+
+public final class UnicodeListActivity extends ListActivity {
+
+    public static final String EXTRA_FROM
+	= "org.madore.android.unicodeMap.range.From";
+    public static final String EXTRA_TO
+	= "org.madore.android.unicodeMap.range.To";
+
+    protected UnicodeDatabase db;
+    protected List<UnicodeCharacter> list;
+
+    /** Called when the activity is first created. */
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+	this.db = new UnicodeDatabase(getApplicationContext());
+	Intent intent = getIntent();
+	int from = intent.getIntExtra(EXTRA_FROM, 0);
+	int to = intent.getIntExtra(EXTRA_TO, from+128);
+	this.list = new ArrayList<UnicodeCharacter>(db.countRange(from,to));
+	for ( UnicodeCharacter ch : db.getRange(from,to) )
+	    list.add(ch);
+	final ClipboardManager cmgr
+	    = (ClipboardManager)getSystemService(Context.CLIPBOARD_SERVICE);
+	setListAdapter(new ArrayAdapter<UnicodeCharacter>(this, R.layout.list_item, list));
+	ListView lv = getListView();
+	lv.setTextFilterEnabled(true);
+	lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+		public void onItemClick(AdapterView<?> parent, View view,
+					int position, long id) {
+		    UnicodeCharacter it = (UnicodeCharacter)parent.getItemAtPosition(position);
+		    Toast.makeText(getApplicationContext(), it.getName(),
+				   Toast.LENGTH_SHORT).show();
+		    cmgr.setText(new String(Character.toChars(it.getCodePoint())));
+		}
+	    });
+
+    }
+
+}
diff --git a/src/org/madore/android/unicodeMap/UnicodeMapActivity.java b/src/org/madore/android/unicodeMap/UnicodeMapActivity.java
index f4c7dc6..fbaced4 100644
--- a/src/org/madore/android/unicodeMap/UnicodeMapActivity.java
+++ b/src/org/madore/android/unicodeMap/UnicodeMapActivity.java
@@ -1,40 +1,53 @@
 package org.madore.android.unicodeMap;
 
+import java.util.Arrays;
 import java.util.List;
-import java.util.ArrayList;
 import android.content.Context;
-import android.content.res.AssetManager;
+import android.content.Intent;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.*;
-import android.text.ClipboardManager;
 import android.app.ListActivity;
 
 public final class UnicodeMapActivity extends ListActivity {
 
-    protected UnicodeDatabase db;
-    protected List<UnicodeCharacter> list;
+    protected static enum UnicodeRange {
+	BASIC_LATIN(0x0000, 0x0080, "Basic Latin"),
+	LATIN_1_SUPPLEMENT(0x0080, 0x0100, "Latin-1 Supplement"),
+	LATIN_EXTENDED_A(0x0100, 0x0180, "Latin Extended-A"),
+	LATIN_EXTENDED_B(0x0180, 0x0250, "Latin Extended-B"),
+	IPA_EXTENSIONS(0x0250, 0x02b0, "IPA Extensions");
+	protected final int from;  protected final int to;
+	protected final String descr;
+	UnicodeRange(int from, int to, String descr) {
+	    this.from = from;
+	    this.to = to;
+	    this.descr = descr;
+	}
+	public String toString() { return this.descr; }
+	public int getFrom() { return this.from; }
+	public int getTo() { return this.to; }
+    }
+
+    protected final List<UnicodeRange> list
+	= Arrays.asList(UnicodeRange.values());
 
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-	this.db = new UnicodeDatabase(getApplicationContext());
-	this.list = new ArrayList<UnicodeCharacter>(db.countRange(0,1024));
-	for ( UnicodeCharacter ch : db.getRange(0,1024) )
-	    list.add(ch);
-	final ClipboardManager cmgr
-	    = (ClipboardManager)getSystemService(Context.CLIPBOARD_SERVICE);
-	setListAdapter(new ArrayAdapter<UnicodeCharacter>(this, R.layout.list_item, list));
+	setListAdapter(new ArrayAdapter<UnicodeRange>(this, R.layout.list_item, list));
 	ListView lv = getListView();
 	lv.setTextFilterEnabled(true);
 	lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
 		public void onItemClick(AdapterView<?> parent, View view,
 					int position, long id) {
-		    UnicodeCharacter it = (UnicodeCharacter)parent.getItemAtPosition(position);
-		    Toast.makeText(getApplicationContext(), it.getName(),
-				   Toast.LENGTH_SHORT).show();
-		    cmgr.setText(new String(Character.toChars(it.getCodePoint())));
+		    UnicodeRange it = (UnicodeRange)parent.getItemAtPosition(position);
+		    Intent intent = new Intent(UnicodeMapActivity.this,
+					       UnicodeListActivity.class);
+		    intent.putExtra(UnicodeListActivity.EXTRA_FROM, it.getFrom());
+		    intent.putExtra(UnicodeListActivity.EXTRA_TO, it.getTo());
+		    startActivity(intent);
 		}
 	    });