class Image{
    public Bitmap image;
    public int imlen=0;//图像总像素数
    public int width;//图像像素矩阵宽
    public int height;//图像像素高
    public int[] pixel;
}
public class second extends Activity{
    /** Called when the activity is first created. */
    private ImageButton btn1;//打开文件
    private EditText edt3;//显示第二幅图片位置
    private ImageButton btn3;//Embedded
    public ImageButton btn4;//extract
    private ImageButton btn5;//save
    private EditText edt;//password
    private EditText edt1;//message
    private ImageView img1;
    public ProgressBar bar;
    public Random random = new Random();
    public String key = null;
    static int[] epixel= null;
    public int p=0;//进度条提示
    static int b=0;
    public Image spic = new Image();
    public Image fpic = new Image();//也许错
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Intent intent = getIntent();
        findview();
        btn1.setOnClickListener(new MyButtonListener());//打开文件，寻找图片
        setImg();
        String location = intent.getStringExtra("location");
        BitmapFactory.Options options = new BitmapFactory.Options();  
        if(options != null && location != null)
        {
        options.inSampleSize = 2;  
        fpic.image = BitmapFactory.decodeFile(location, options);//get first image
        if(fpic.image != null)
        {
            fpic.image = fpic.image.copy(Bitmap.Config.ARGB_8888, true);
            fpic.imlen = (int) fpic.image.getHeight()*fpic.image.getWidth();
            fpic.pixel = new int[fpic.imlen];
            fpic.image.getPixels(fpic.pixel,0,fpic.image.getWidth(),0,0,fpic.image.getWidth(),fpic.image.getHeight());
            btn3.setOnClickListener(new OnClickListener(){
                    @Override
                    public void onClick(View v) {//TODO Auto-generated method stub
                        if(b==0)
                            Toast.makeText(second.this,"请先从图库中选择图片或者拍照", Toast.LENGTH_SHORT).show();
                        else
                            if(edt.getText().toString().length()==0)
                               Toast.makeText(second.this,"请先输入要密钥", Toast.LENGTH_SHORT).show();
                        if(edt1.getText().toString().length()==0)
                               Toast.makeText(second.this,"请先输入要嵌入的内容", Toast.LENGTH_SHORT).show();
                        else{
                               try {
                                   key = edt.getText().toString();
                                   byte[] message = edt1.getText().toString().getBytes("ASCII");//嵌入信息（Byte形式)
                                   int[] embed = new int[message.length*8];
                                   embed= match(message,fpic.pixel);//得到匹配序列
                                   String slocation = edt3.getText().toString();
                                   BitmapFactory.Options options = new BitmapFactory.Options();  
                                    if(options != null && slocation != null)
                                    {
                                        options.inSampleSize = 2;  
                                        spic.image = BitmapFactory.decodeFile(slocation, options);//get first image
                                        if(spic.image != null)
                                        {
                                            spic.image = spic.image.copy(Bitmap.Config.ARGB_8888, true);
                                            spic.imlen = (int) spic.image.getHeight()*spic.image.getWidth();
                                            spic.pixel = new int[spic.imlen];
                                            spic.image.getPixels(spic.pixel,0,spic.image.getWidth(),0,0,spic.image.getWidth(),spic.image.getHeight());
                                        }
                                        }
                                    spic.height = spic.image.getHeight();
                                    spic.pixel = embeded(spic.pixel,embed,key);//嵌入匹配序列
                                    edt.setText("");//将Password置空
                                    edt1.setText("");//将嵌入信息置空
                                    b=2;
                               }
                                
                               catch (Exception e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            } 
                           }
                    }
       });