if statment is not working propaply in android

hello guys im newbie in android i want just to change the text view text if the caculate value between 18 or 25 i used if statment but there is no results any idea sometimes if i removed one of the >its worked but only for biggest value

public class GB extends ActionBarActivity {
ImageView im1;
EditText mEditText1,mEditText2;
TextView mTextView,m5;
Button mButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_GB);
    im1 = (ImageView)findViewById(R.id.imageView1);
    mEditText1 =         (EditText)findViewById(R.id.editText1);
        mEditText2 =        (EditText)findViewById(R.id.editText2);
    mTextView = (TextView)findViewById(R.id.textView4);
    m5 = (TextView)findViewById(R.id.textView5);
    mButton =  (Button)findViewById(R.id.button1);
    mButton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            switch (v.getId()){
            case R.id.button1:
            }
            String word2 = mEditText2.getText().toString();
            String word = mEditText1.getText().toString();
          if (word.trim().equals("")){ 

              mEditText1.setError("Insert Hight");
          }
          else if (word2.trim().equals("")){
              mEditText2.setError("Insert Wight");
          }
          else{

                calculate();
            }
            }});

    }

    public void calculate(){
        Double value1 = Double.parseDouble(mEditText1.getText().toString());
        Double value2 = Double.parseDouble(mEditText2.getText().toString());
        Double calculatedValue = value1/(value2*value2)*10000;
        calculatedValue = Math.round(calculatedValue*10)/10.0d;
        mTextView.setText(calculatedValue.toString());

        if (mTextView.getText().toString().trim().length() <10 && mTextView.getText().toString().trim().length() >18) {
              im1.setBackgroundResource(R.drawable.s1);
              m5.setText("low");}
          else{
               if (mTextView.getText().toString().trim().length() <18 && mTextView.getText().toString().trim().length() >25) {
      im1.setBackgroundResource(R.drawable.s3);
     m5.setText("Best");}
               else {
                if(mTextView.getText().toString().trim().length() <25 && mTextView.getText().toString().trim().length() >100) {
                  im1.setBackgroundResource(R.drawable.s3);
                 m5.setText("over");


              }         ;

                }


    }
               }
          }