list12.java

Android的应用实例

/* 
 * Copyright (C) 2007 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.view;

import android.app.ListActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;

import com.example.android.apis.R;

import java.util.ArrayList;

/**
 * Demonstrates the using a list view in transcript mode
 *
 */
public class List12 extends ListActivity implements OnClickListener, OnKeyListener {

    private EditText mUserText;
    
    private ArrayAdapter<String> mAdapter;
    
    private ArrayList<String> mStrings = new ArrayList<String>();
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        setContentView(R.layout.list_12);
        
        mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mStrings);
        
        setListAdapter(mAdapter);
        
        mUserText = (EditText) findViewById(R.id.userText);

        mUserText.setOnClickListener(this);
        mUserText.setOnKeyListener(this);
    }

    public void onClick(View v) {
        sendText();
    }

    private void sendText() {
        String text = mUserText.getText().toString();
        mAdapter.add(text);
        mUserText.setText(null);
    }

    public boolean onKey(View v, int keyCode, KeyEvent event) {
        if (event.getAction() == KeyEvent.ACTION_DOWN) {
            switch (keyCode) {
                case KeyEvent.KEYCODE_DPAD_CENTER:
                case KeyEvent.KEYCODE_ENTER:
                    sendText();
                    return true;
            }
        }
        return false;
    }
    

}