public int n;
private String str;
public float a1[],a2[],b1[],b2[],x11,x22,y11,y22,L[], K[][][],cos[],sin[];
public float u,v;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    final TextView cikti= (TextView) findViewById(R.id.eno);
    final TextView boy= (TextView) findViewById(R.id.L);
    final EditText m = (EditText) findViewById(R.id.n);
    final EditText x1 = (EditText) findViewById(R.id.x1);
    final EditText x2 = (EditText) findViewById(R.id.x2);
    final EditText y1 = (EditText) findViewById(R.id.y1);
    final EditText y2 = (EditText) findViewById(R.id.y2);
    final Button kayit = (Button) findViewById(R.id.kaydet);

    kayit.setOnClickListener (new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            n=Integer.parseInt(m.getText().toString());
            x11= Float.parseFloat(x1.getText().toString());
            x22= Float.parseFloat(x2.getText().toString());
            y11= Float.parseFloat(y1.getText().toString());
            y22= Float.parseFloat(y2.getText().toString());

            a1 = new float[n];
            a2 = new float[n];
            b1 = new float[n];
            b2 = new float[n];
            L = new  float[n];
            cos = new  float[n];
            sin = new  float[n];
            K = new  float[n][4][4];
            str="";


            //a1[0]=x11;
            //cikti.setText(String.valueOf(a1[0]));
            for (int i=0; i<n; i++){
                // boy.setText(String.valueOf(L[0])+"-"+String.valueOf(cos[0])+"-"+String.valueOf(sin[0]));


                a1[i]=x11;
                a2[i]=x22;
                b1[i]=y11;
                b2[i]=y22;
                float xx = a2[i]-a1[i];
                float yy = b2[i]-b1[i];
                L[i]= Float.parseFloat(String.valueOf(Math.hypot(xx,yy)));
                cos[i]= xx/L[i];
                sin[i]= yy/L[i];


                K[i][0][0]= cos[i]*cos[i];      K[i][0][1]= cos[i]*sin[i];       K[i][0][2]= -cos[i]*cos[i];        K[i][0][3]= -cos[i]*sin[i];
                K[i][1][0]= cos[i]*sin[i];      K[i][1][1]= sin[i]*sin[i];       K[i][1][2]= -cos[i]*sin[i];        K[i][1][3]= -sin[i]*sin[i];
                K[i][2][0]= -cos[i]*cos[i];     K[i][2][1]= -cos[i]*sin[i];      K[i][2][2]= cos[i]*cos[i];         K[i][2][3]= cos[i]*sin[i];
                K[i][3][0]= -cos[i]*sin[i];     K[i][3][1]= -sin[i]*sin[i];      K[i][3][2]= cos[i]*sin[i];         K[i][3][3]= sin[i]*sin[i];






                cikti.setText(String.valueOf(a1[0])+"-"+String.valueOf(a2[0])+"-"+String.valueOf(b1[0])+"-"
                        +String.valueOf(b2[0])+"-"+String.valueOf(n)+"-");
                for(int x=0;x<4;x++){
                    for(int y=0;y<4;y++){
                        str+=(String.valueOf(K[i][x][y])+" ");
                        boy.setText(str);
                    }
                    str+="n";

                }

            }


        }
    });


}









@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}