我想通过单击一个按钮将从 EditText 获得的值传递给两个活动。我设法将值传递给一个活动,在 textview 中显示它,我想对另一个活动做同样的事情,但我不确定 switch case 是否是正确的使用方法,因为只有一个按钮。
这是第一个活动的代码:
public class ProfInfo1 extends Activity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.profinfo1);
final EditText et0 = (EditText) findViewById (R.id.et_name);
final EditText et1 = (EditText) findViewById (R.id.et_age);
final EditText et2 = (EditText) findViewById (R.id.et_height);
final EditText et3 = (EditText) findViewById (R.id.et_weight);
Button back = (Button) findViewById(R.id.btn_back1);
back.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent a = new Intent(ProfInfo1.this, WelcomeActivity.class);
startActivity(a);
}
});
Button next = (Button) findViewById(R.id.btn_next1);
next.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(ProfInfo1.this, ViewProf1.class);
intent.putExtra("name", et0.getText().toString());
intent.putExtra("age", et1.getText().toString());
intent.putExtra("height", et2.getText().toString());
intent.putExtra("weight", et3.getText().toString());
startActivity(intent);
}
});
}
}
这是显示值的第二个活动:
public class ViewProf1 extends Activity {
EditText age, height, weight;
String a, h, w;
Float age1, height1, weight1;
float bmi, cal;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.profinfo1view);
TextView nameView = (TextView) findViewById (R.id.view_name);
nameView.setText("Hello " + getIntent().getExtras().getString("name") + ",");
TextView ageView = (TextView) findViewById (R.id.view_age);
ageView.setText("Age: " + getIntent().getExtras().getString("age"));
TextView heightView = (TextView) findViewById (R.id.view_height);
heightView.setText("Your current height is " + getIntent().getExtras().getString("height") + " m.");
TextView weightView = (TextView) findViewById (R.id.view_weight);
weightView.setText("Your current weight is " + getIntent().getExtras().getString("weight") + " kg.");
a = getIntent().getExtras().getString("age");
h = getIntent().getExtras().getString("height");
w = getIntent().getExtras().getString("weight");
age1 = Float.valueOf(a).floatValue();
height1 = Float.valueOf(h).floatValue();
weight1 = Float.valueOf(w).floatValue();
//bmi calculation
bmi = (float) (weight1/Math.pow(height1, 2));
TextView showresult = (TextView) findViewById (R.id.view_bmi);
showresult.setText("Your BMI is " + Float.valueOf(bmi) + ".");
//cal intake calculation
cal = (float) (((655 + (9.6 * weight1) + (1.8 * height1) - (4.7 * age1)) * 1.2) - 550);
TextView showcal = (TextView) findViewById (R.id.view_cal);
showcal.setText("Your ideal daily calories intake is " + Float.valueOf(cal) + ".");
//next button
Button next2 = (Button) findViewById (R.id.btn_next2);
next2.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent a = new Intent(ViewProf1.this, FoodDiary.class);
startActivity(a);
}
});
//back button
Button back2 = (Button) findViewById (R.id.btn_back2);
back2.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent a = new Intent(ViewProf1.this, ProfInfo1.class);
startActivity(a);
}
});
}
第三项活动:
public class CompareWeight extends Activity {
EditText weight;
String w;
Float weight1;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.compareweight);
TextView weightView = (TextView) findViewById (R.id.test);
weightView.setText("Your previous weight is " + getIntent().getExtras().getString("weight") + " kg.");
w = getIntent().getExtras().getString("weight");
weight1 = Float.valueOf(w).floatValue();
}
}
我只想将重量值传递给第三个活动。