bmi.rar_BMI_BMI android_android

package my.BMI; import java.text.DecimalFormat; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; public class BMIActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //Listen for button clicks findViews(); setListensers(); } private Button button_calc; private EditText field_height; private EditText field_weight; private TextView view_result; private TextView view_suggest; private void findViews() { button_calc = (Button) findViewById(R.id.submit); field_height = (EditText) findViewById(R.id.height); field_weight = (EditText) findViewById(R.id.weight); view_result = (TextView) findViewById(R.id.result); view_suggest = (TextView) findViewById(R.id.suggest); } private void setListensers() { button_calc.setOnClickListener(calcBMI); } private Button.OnClickListener calcBMI = new Button.OnClickListener() { public void onClick(View v) { DecimalFormat nf = new DecimalFormat("0.00"); double height = Double.parseDouble(field_height.getText().toString())/100; double weight = Double.parseDouble(field_weight.getText().toString()); double BMI = weight / (height * height); view_result.setText(getText(R.string.bmi_result)+nf.format(BMI)); if(BMI>25) { view_suggest.setText(R.string.advice_heavy); } else if(BMI<20) { view_suggest.setText(R.string.advice_light); } else { view_suggest.setText(R.string.advice_average); } //openOptionsDialog(); } }; private void openOptionsDialog() { /**/ new AlertDialog.Builder(BMIActivity.this) .setTitle(R.string.about_title) .setMessage(R.string.about_msg) .setPositiveButton (R.string.ok_label, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialoginterface, int i) { } } ) .setNegativeButton (R.string.homepage_label, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialoginterface, int i) { Uri uri = Uri.parse(getString(R.string.homepage_uri)); Intent intent = new Intent(Intent.ACTION_VIEW, uri); startActivity(intent); } } ) .show(); //Toast.makeText(BMIActivity.this, "BMI 计算器", Toast.LENGTH_SHORT).show(); } protected static final int MENU_ABOUT = Menu.FIRST; protected static final int MENU_Quit = Menu.FIRST+1; @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); menu.add(0, MENU_ABOUT, 0, "关于..."); menu.add(0, MENU_Quit, 0, "结束"); return true; } public boolean onOptionsItemSelected(MenuItem item) { super.onOptionsItemSelected(item); switch(item.getItemId()) { case MENU_ABOUT: openOptionsDialog(); break; case MENU_Quit: finish(); break; } return true; } }