android参数传递出错,该怎么处理

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)        {            Toast.makeText(second.this,"有执行噢", Toast.LENGTH_SHORT).show();        options.inSampleSize = 2;          fpic.image = BitmapFactory.decodeFile(location, options);//get first image        if(fpic.image != null)        {            Toast.makeText(second.this,"也有执行噢", Toast.LENGTH_SHORT).show();            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());            fpic.height = fpic.image.getHeight();            fpic.width = fpic.image.getWidth();        }        }//第一幅图片读取完        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", 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();                    else                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 {                           Toast.makeText(second.this,"开始啦", Toast.LENGTH_SHORT).show();                           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();                           int c= 9;                           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();                        Toast.makeText(second.this,"异常抛出啦！！！！问题没有解决，加油吧", Toast.LENGTH_SHORT).show();                    }                    }            }});       //btn3.setOnClickListener(new EmButtonListener());}    public void setImg() {        // TODO Auto-generated method stub        Bundle bun=this.getIntent().getExtras();        if(bun!=null){            String str;            str =bun.getString("FName");             edt3.setText(str);            Bitmap map=BitmapFactory.decodeFile(bun.getString("FName"));            img1.setImageBitmap(map);        }    }    public void findview(){        btn1 = (ImageButton) findViewById(R.id.btn1);        edt3 = (EditText) findViewById(R.id.edt3);        btn3 = (ImageButton) findViewById(R.id.btn3);        btn4 = (ImageButton) findViewById(R.id.btn4);        btn5 = (ImageButton) findViewById(R.id.btn5);        edt = (EditText) findViewById(R.id.edt0);        edt1 =(EditText) findViewById(R.id.edt1);        img1 = (ImageView) findViewById(R.id.img1);        bar = (ProgressBar)findViewById(R.id.firstBar);    }class MyButtonListener implements OnClickListener {               @Override        public void onClick (View v)        {            //TODO Auto-generated method stub            Intent in=new Intent();            in.setClass(second.this, FileMang.class);            startActivity(in);           // b=1;//定义点击顺序的变量            finish();        }    }