ListView Animation

Author: silicon ruby

ListViewActivity.java

@@ -0,0 +1,142 @@
+package com.example.listviewtest;
+
+import java.util.ArrayList;
+
+import android.app.Activity;
+import android.content.Context;
+import android.os.Bundle;
+import android.util.DisplayMetrics;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.animation.Animation;
+import android.view.animation.ScaleAnimation;
+import android.view.animation.TranslateAnimation;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+import android.widget.TextView;
+
+public class ListViewActivity extends Activity {
+
+	private ListView listview;
+	private DisplayMetrics metrics;
+	private int mode = 1;
+
+	@Override
+	protected void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+
+		metrics = new DisplayMetrics();
+		getWindowManager().getDefaultDisplay().getMetrics(metrics);
+
+		listview = new ListView(this);
+		listview.setFadingEdgeLength(0);
+		ArrayList<String> strings = new ArrayList<String>();
+
+		for (int i = 0; i < 300; i++) {
+			strings.add("Item:#" + (i + 1));
+		}
+
+		MainAdapter mAdapter = new MainAdapter(this, strings, metrics);
+
+		listview.setAdapter(mAdapter);
+
+		setContentView(listview);
+
+	}
+
+	@Override
+	public boolean onCreateOptionsMenu(Menu menu) {
+		boolean result = super.onCreateOptionsMenu(menu);
+		menu.add(Menu.NONE, 1, 0, "1");
+		menu.add(Menu.NONE, 2, 0, "2");
+		menu.add(Menu.NONE, 3, 0, "3");
+		menu.add(Menu.NONE, 4, 0, "4");
+		return result;
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		mode = item.getItemId();
+		return super.onOptionsItemSelected(item);
+	}
+
+	public class MainAdapter extends ArrayAdapter<String> {
+		private Context context;
+		private LayoutInflater mInflater;
+		private ArrayList<String> strings;
+		private DisplayMetrics metrics_;
+
+		private class Holder {
+			public TextView textview;
+		}
+
+		public MainAdapter(Context context, ArrayList<String> strings,
+				DisplayMetrics metrics) {
+			super(context, 0, strings);
+			this.context = context;
+			this.mInflater = (LayoutInflater) this.context
+					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+			this.strings = strings;
+			this.metrics_ = metrics;
+		}
+
+		@Override
+		public View getView(final int position, View convertView,
+				ViewGroup parent) {
+			final String str = this.strings.get(position);
+			final Holder holder;
+
+			if (convertView == null) {
+				convertView = mInflater.inflate(
+						android.R.layout.simple_list_item_1, null);
+				convertView.setBackgroundColor(0xFF202020);
+
+				holder = new Holder();
+				holder.textview = (TextView) convertView
+						.findViewById(android.R.id.text1);
+				holder.textview.setTextColor(0xFFFFFFFF);
+
+				convertView.setTag(holder);
+			} else {
+				holder = (Holder) convertView.getTag();
+			}
+
+			holder.textview.setText(str);
+
+			Animation animation = null;
+
+			switch (mode) {
+			case 1:
+				animation = new TranslateAnimation(metrics_.widthPixels / 2, 0,
+						0, 0);
+				break;
+
+			case 2:
+				animation = new TranslateAnimation(0, 0, metrics_.heightPixels,
+						0);
+				break;
+
+			case 3:
+				animation = new ScaleAnimation((float) 1.0, (float) 1.0,
+						(float) 0, (float) 1.0);
+				break;
+
+			case 4:
+				// non animation
+				animation = new Animation() {
+				};
+				break;
+			}
+
+			animation.setDuration(750);
+			convertView.startAnimation(animation);// key code
+			animation = null;
+
+			return convertView;
+		}
+	}
+
+}