自我LV1

這是TQC的205題，

程式碼為自行撰寫，

僅供參考。

 

主要是練習在命令模式(command) 存/放檔案。

1-開啟模擬器

2-切換到模擬器目錄

3-下「adb push 」-放檔案

程式部份注意用檔案放置圖片。

	        File f=new File(fileName);   
	        if(f.exists()) 
	        { 
	        	mTextView.setText(fileName);
	        	Bitmap bm = BitmapFactory.decodeFile(fileName);
	            mImageView.setImageBitmap(bm);
	          
	        } 
	        else 
	        {  
	          mTextView.setText("檔案不存在"); 
	        } 

 

package COM.TQC.GDD02;


import java.io.File;


import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

public class GDD02 extends Activity
{
  
  private ImageView mImageView;
  private Button mButton,mButton2;
  private TextView mTextView;
  //private String fileName="/data/data/COM.TQC.GDD02/001.PNG";
  private String fileName= "/sdcard/png002.PNG";
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);    
    setContentView(R.layout.main);
    
    findview();
    setlistener();
    
    mImageView.setImageResource(R.drawable.icon);
    //mTextView.setText(mImageView.);
     
  }
  
  public void findview()
  {
	  	mImageView = (ImageView)findViewById(R.id.mImageView);
	    mTextView=(TextView)findViewById(R.id.mTextView);
	    mButton = (Button)findViewById(R.id.mButton);
	    mButton2=(Button)findViewById(R.id.button1);
  }
  
  public void setlistener()
  {
	  mButton.setOnClickListener(new Button.OnClickListener()
	    {
	      public void onClick(View v)
	      {
	    	//mImageView.setImageResource(R.drawable.png002);
	    
	        File f=new File(fileName);   
	        if(f.exists()) 
	        { 
	        	mTextView.setText(fileName);
	        	Bitmap bm = BitmapFactory.decodeFile(fileName);
	            mImageView.setImageBitmap(bm);
	          
	        } 
	        else 
	        {  
	          mTextView.setText("檔案不存在"); 
	        } 
	      } 
	    });
	    

	    mButton2.setOnClickListener(new Button.OnClickListener()
	    {
	      public void onClick(View v)
	      {
	    	  mTextView.setText("");
	    	  mImageView.setImageResource(R.drawable.icon);
	      }
	    });
  }
  
}

 

 

自我LV~