titleeditor.java

基于ANdroid平台的高欢堂书籍的对应源代码 非常有用

package com.android.notepad;
import com.android.notepad.NotePad.Notes;
import android.app.Activity;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class TitleEditor extends Activity implements View.OnClickListener {
    private int state_var_A;
    public static final String EDIT_TITLE_ACTION = "com.android.notepad.action.EDIT_TITLE";

    private static final String[] PROJECTION = new String[] {
            NotePad.Notes._ID, // 0
            NotePad.Notes.TITLE, // 1
    };
    private static final int COLUMN_INDEX_TITLE = 1;

    //private Cursor mCursor;

    private EditText mText;

    private Uri mUri;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
           goto_state_1();
    }
    
    void goto_state_1(){
    	state_var_A = 1;
        setContentView(R.layout.title_editor);
        mUri = getIntent().getData();
        mText = (EditText) this.findViewById(R.id.title);
        mText.setOnClickListener(this);
        Button b = (Button) findViewById(R.id.ok);
        b.setOnClickListener(this);
    }

    void goto_state_2(){
        state_var_A = 2;
    }
    
    @Override
    protected void onResume() {
        super.onResume();
           	  Cursor mCursor = managedQuery(mUri, PROJECTION, null, null, null);
           	  if(mCursor != null){
                  mCursor.moveToFirst();
                  mText.setText(mCursor.getString(COLUMN_INDEX_TITLE));
           	  }
              goto_state_2();
        }
  
    @Override
    protected void onPause() {
        super.onPause();
         	goto_state_3();
    }
        
   void goto_state_3(){     
            state_var_A = 3;
            ContentValues values = new ContentValues();
            values.put(Notes.TITLE, mText.getText().toString());
            getContentResolver().update(mUri, values, null, null);
        }
  
    public void onClick(View v) {
         finish();
    }
}