2014年11月3日 星期一

android程式設計實例入門 -Sample改寫分享 (2014/11/04)

android程式設計實例入門 -Sample改寫分享 (2014/11/04)


 


此範例為程式碼(08\Sample07)的改寫，建立兩個Activity，利用Intent在兩個Activity互傳訊息，程式碼如下所示：


 












package com.jashsample;

import java.io.File;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Random;

import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaRecorder;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.ContactsContract;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.SearchManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnKeyListener;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Camera;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.hardware.Camera.Size;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.speech.RecognizerIntent;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.text.format.DateFormat;
import android.text.method.KeyListener;
import android.view.Display;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.RotateAnimation;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ViewFlipper;
/*
 * 建立兩個Activity，利用Intent在兩個Activity互傳訊息。
 */
/*
 * <activity android:name=".SampleInput" />
 */
public class MainActivity extends Activity {
	public static int SAMPLE_APP = 1;
	ListView lv;
	Button bt1, bt2;
	ArrayList<HashMap<String, String>> data;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
	      LinearLayout ll = new LinearLayout(this); 
	      ll.setOrientation(LinearLayout.VERTICAL);
	      setContentView(ll);
	            
	      lv = new ListView(this);
	      
	      bt1 = new Button(this);
	      bt2 = new Button(this);
	      
	      bt1.setText("新建");
	      bt2.setText("刪除");
	      
	      data = new ArrayList<HashMap<String, String>>();
	      
	      String[] str = {"Title", "Todo"};
	      int[] ids = {android.R.id.text1, android.R.id.text2};
	      
	      SimpleAdapter ad = new SimpleAdapter(this, data, 
	         android.R.layout.simple_list_item_single_choice, str,ids);
	      lv.setAdapter(ad);
	      lv.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
	      
	      ll.addView(bt1);
	      ll.addView(bt2);
	      ll.addView(lv);
	      
	      lv.setOnItemClickListener(new SampleItemClickListener());
	      bt1.setOnClickListener(new SampleClickListener());//import android.view.View.OnClickListener;
	      bt2.setOnClickListener(new SampleClickListener());//import android.view.View.OnClickListener;
	}
	class SampleClickListener implements OnClickListener
	{
		public void onClick(View v)
		{
			if(v == bt1)
			{
				Intent it = new Intent(getApplicationContext(), SampleInput.class);
				int pos = data.size();
				String title = "標題";
				String todo = "TODO";
				it.putExtra("Title", title);
				it.putExtra("Todo", todo);
				it.putExtra("Pos", pos);
				startActivityForResult(it, SAMPLE_APP);        	 
			}
			else if(v == bt2)
			{     
				int pos = lv.getCheckedItemPosition();
				if(pos >= 0)
				{
					data.remove(pos);
					SimpleAdapter ad = (SimpleAdapter) lv.getAdapter();
					ad.notifyDataSetChanged();
					lv.setItemChecked(-1, true);
				}
			}
		}
	}  
	class SampleItemClickListener implements OnItemClickListener
	{
		public void onItemClick(AdapterView<?>v, View iv, int pos, long id)
		{
			Intent it = new Intent(getApplicationContext(), SampleInput.class);
			HashMap<String, String> hm = data.get(pos);
			String title = hm.get("Title");
			String todo = hm.get("Todo");
			it.putExtra("Title", title);
			it.putExtra("Todo", todo);
			it.putExtra("Pos", pos);
			startActivityForResult(it, SAMPLE_APP);  
		}
	}
	public void onActivityResult(int reqcode, int result, Intent it)
	{
		if(reqcode == SAMPLE_APP && result == RESULT_OK)
		{
			String title = it.getStringExtra("Title");
			String todo = it.getStringExtra("Todo");
			int pos = it.getIntExtra("Pos", 0);
			HashMap<String, String> hm= new HashMap<String, String>();
			hm.put("Title", title);
			hm.put("Todo", todo);
	          
			if(pos == data.size())
			{
				data.add(pos, hm);
			}
			else
			{
				data.set(pos, hm);
			}
			SimpleAdapter ad = (SimpleAdapter) lv.getAdapter();
			ad.notifyDataSetChanged();
		}
	}   
}


package com.jashsample;

import com.jashsample.MainActivity.SampleClickListener;

import android.app.Activity;
import android.view.View.OnClickListener;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;

public class SampleInput extends Activity
{
   EditText et1, et2;
   Button bt;
   String title, todo;
   int pos;
   Intent it;
   
   public void onCreate(Bundle savedInstanceState)
   {
      super.onCreate(savedInstanceState);
      LinearLayout ll = new LinearLayout(this); 
      ll.setOrientation(LinearLayout.VERTICAL);
      setContentView(ll);
            
      et1 = new EditText(this);
      et2 = new EditText(this);
      bt = new Button(this);
      
      bt.setText("OK");
      
      it = getIntent();
	  title = it.getStringExtra("Title");
	  todo = it.getStringExtra("Todo");
	  pos = it.getIntExtra("Pos", 0);
	  et1.setText(title);
	  et2.setText(todo);
    
      ll.addView(et1);
      ll.addView(et2);
      ll.addView(bt);
      
      bt.setOnClickListener(new SampleClickListener());//import android.view.View.OnClickListener;
   }
   class SampleClickListener implements OnClickListener
   {
      public void onClick(View v)
      {
    	  it.putExtra("Title", et1.getText().toString());
          it.putExtra("Todo", et2.getText().toString());
          it.putExtra("Pos", pos);
         
          setResult(RESULT_OK, it);      	 
          finish();
      }
   }
}


 













 




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