大家好我有一个小问题。我在滚动视图中有7个edittext，当我在第一个edittext中放入一些数据并向下滚动以按下按钮（进行一些计算）时，我丢失了数据并将焦点转到其他edittext。谁能帮我吗。 非常感谢
答案 0 :(得分：0)
public class LengthMainActivity extends Activity implements OnFocusChangeListener {
private Button convert;
private Button back;
private EditText edtext1,edtext2,edtext3,edtext4,edtext5,edtext6,edtext7;
private Button clear;
private float numb;
private String labelon;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.length_main);
addListenerOnButton();
edtext1 = (EditText)this.findViewById(R.id.editText1);
edtext2 = (EditText)this.findViewById(R.id.editText2);
edtext3 = (EditText)this.findViewById(R.id.editText3);
edtext4 = (EditText)this.findViewById(R.id.editText4);
edtext5 = (EditText)this.findViewById(R.id.editText5);
edtext6 = (EditText)this.findViewById(R.id.editText6);
edtext7 = (EditText)this.findViewById(R.id.editText7);
edtext1.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View arg0, boolean hasFocus) {
// TODO Auto-generated method stub
if(edtext1.hasFocus())
{getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
edtext7.clearFocus();edtext2.clearFocus();edtext3.clearFocus();edtext4.clearFocus();edtext5.clearFocus();edtext6.clearFocus();
edtext2.setText("");edtext3.setText("");edtext4.setText("");edtext5.setText("");edtext6.setText("");edtext7.setText("");
}
}
}) ;
edtext2.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View arg0, boolean hasFocus) {
// TODO Auto-generated method stub
if(edtext2.hasFocus())
{getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
edtext1.clearFocus();edtext7.clearFocus();edtext3.clearFocus();edtext4.clearFocus();edtext5.clearFocus();edtext6.clearFocus();
edtext1.setText("");edtext3.setText("");edtext4.setText("");edtext5.setText("");edtext6.setText("");edtext7.setText("");
}
}
}) ;
edtext3.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View arg0, boolean hasFocus) {
// TODO Auto-generated method stub
if(edtext3.hasFocus())
{getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
edtext1.clearFocus();edtext2.clearFocus();edtext7.clearFocus();edtext4.clearFocus();edtext5.clearFocus();edtext6.clearFocus();
edtext1.setText("");edtext2.setText("");edtext4.setText("");edtext5.setText("");edtext6.setText("");edtext7.setText("");
}
}
}) ;
edtext4.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View arg0, boolean hasFocus) {
// TODO Auto-generated method stub
if(edtext4.hasFocus())
{getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
edtext1.clearFocus();edtext2.clearFocus();edtext3.clearFocus();edtext7.clearFocus();edtext5.clearFocus();edtext6.clearFocus();
edtext1.setText("");edtext2.setText("");edtext3.setText("");edtext5.setText("");edtext6.setText("");edtext7.setText("");
}
}
}) ;
edtext5.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View arg0, boolean hasFocus) {
// TODO Auto-generated method stub
if(edtext5.hasFocus())
{getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
edtext1.clearFocus();edtext2.clearFocus();edtext3.clearFocus();edtext4.clearFocus();edtext7.clearFocus();edtext6.clearFocus();
edtext1.setText("");edtext2.setText("");edtext3.setText("");edtext4.setText("");edtext6.setText("");edtext7.setText("");
}
}
}) ;
edtext6.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View arg0, boolean hasFocus) {
// TODO Auto-generated method stub
if(edtext6.hasFocus())
{
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
edtext1.clearFocus();edtext2.clearFocus();edtext3.clearFocus();edtext4.clearFocus();edtext5.clearFocus();edtext7.clearFocus();
edtext1.setText("");edtext2.setText("");edtext3.setText("");edtext4.setText("");edtext5.setText("");edtext7.setText("");
}
}
}) ;
edtext7.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View arg0, boolean hasFocus) {
// TODO Auto-generated method stub
if(edtext7.hasFocus())
{
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
edtext1.clearFocus();edtext2.clearFocus();edtext3.clearFocus();edtext4.clearFocus();edtext5.clearFocus();edtext6.clearFocus();
edtext1.setText("");edtext2.setText("");edtext3.setText("");edtext4.setText("");edtext5.setText("");edtext6.setText("");
}
}
}) ;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.length_main, menu);
return true;
}
private void addListenerOnButton() {
convert = (Button)this.findViewById(R.id.button1);
convert.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v)
{
try
{
if(edtext1.hasFocus())
{
labelon = edtext1.getText().toString();
numb = Float.parseFloat(labelon);
double result = numb*1000;
String res = String.valueOf(result);
Toast.makeText(LengthMainActivity.this, res, Toast.LENGTH_SHORT).show();
}
else if (edtext2.hasFocus())
{
labelon = edtext2.getText().toString();
numb = Float.parseFloat(labelon);
double result = numb*1000;
String res = String.valueOf(result);
Toast.makeText(LengthMainActivity.this, res, Toast.LENGTH_SHORT).show();
}
else if(edtext3.hasFocus())
{
labelon = edtext3.getText().toString();
numb = Float.parseFloat(labelon);
double result = numb*.621371;
String res = String.valueOf(result);
Toast.makeText(LengthMainActivity.this, res, Toast.LENGTH_SHORT).show();
}
else if(edtext4.hasFocus())
{
labelon = edtext4.getText().toString();
numb = Float.parseFloat(labelon);
double result = numb*0.6213710;
String res = String.valueOf(result);
Toast.makeText(LengthMainActivity.this, res, Toast.LENGTH_SHORT).show();
}
else if(edtext5.hasFocus())
{
labelon = edtext5.getText().toString();
numb = Float.parseFloat(labelon);
double result = numb*30.48;
String res = String.valueOf(result);
Toast.makeText(LengthMainActivity.this, res, Toast.LENGTH_SHORT).show();
}
else if(edtext6.hasFocus())
{
labelon = edtext6.getText().toString();
numb = Float.parseFloat(labelon);
double result = numb*12;
String res = String.valueOf(result);
Toast.makeText(LengthMainActivity.this, res, Toast.LENGTH_SHORT).show();
}
else if (edtext7.hasFocus())
{
labelon = edtext7.getText().toString();
numb = Float.parseFloat(labelon);
double result = numb*(.3937);
String res = String.valueOf(result);
Toast.makeText(LengthMainActivity.this, res, Toast.LENGTH_SHORT).show();
}
else //if((edtext1.getText().toString().length()==0) &&(edtext2.getText().toString().length()==0)&&(edtext3.getText().toString().length()==0)&&(edtext4.getText().toString().length()==0))
{
Toast.makeText(LengthMainActivity.this, "Please provide vlaues", Toast.LENGTH_SHORT).show();
}
}
catch(NumberFormatException ne)
{
System.err.print("exception is::::" + ne);
}
}
});
back = (Button)this.findViewById(R.id.button2);
back.setOnClickListener(new OnClickListener()
{@Override
public void onClick(View v)
{
Intent myint = new Intent();
myint.setClass(LengthMainActivity.this, MainActivity.class);
startActivity(myint);
}
});
clear = (Button)this.findViewById(R.id.Clear);
clear.setOnClickListener(new OnClickListener()
{@Override
public void onClick(View v)
{
edtext1.setText("");
edtext2.setText("");
edtext3.setText("");
edtext4.setText("");
edtext5.setText("");
edtext6.setText("");
edtext7.setText("");
}
});
}
@Override
public void onFocusChange(View arg0, boolean arg1) {
// TODO Auto-generated method stub
}
}
答案 1 :(得分：0)
this is my xml
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/scrollview1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:fillViewport="true"
tools:context=".LengthMainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="10dp" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="14dp"
android:layout_marginTop="20dp"
android:text="@string/Please_provide_length" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="40dp"
android:text="@string/Kilometers_To_Meters" />
<EditText
android:id="@+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="5dp"
android:ems="10"
android:inputType="number|numberDecimal"
android:singleLine="true"
android:focusable="true"
android:focusableInTouchMode="true" />
<requestFocus/>
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:text="@string/Meters_To_Centimeters" />
<EditText
android:id="@+id/editText2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="5dp"
android:ems="10"
android:inputType="numberDecimal|numberDecimal"
android:focusable="true"
android:focusableInTouchMode="true"/>
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:text="@string/Kilometer_To_Mile" />
<EditText
android:id="@+id/editText3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="5dp"
android:ems="10"
android:inputType="numberDecimal|numberDecimal"
android:focusable="true"
android:focusableInTouchMode="true"/>
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:text="@string/Yards_To_Meters" />
<EditText
android:id="@+id/editText4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="5dp"
android:ems="10"
android:inputType="numberDecimal|numberDecimal"
android:focusable="true"
android:focusableInTouchMode="true" />
<TextView
android:id="@+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:text="@string/Feet_To_Centimeters" />
<EditText
android:id="@+id/editText5"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="5dp"
android:ems="10"
android:inputType="numberDecimal|numberDecimal"
android:focusable="true"
android:focusableInTouchMode="true"/>
<TextView
android:id="@+id/textView7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:text="@string/Feet_To_Inches" />
<EditText
android:id="@+id/editText6"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="5dp"
android:ems="10"
android:inputType="numberDecimal|numberDecimal"
android:focusable="true"
android:focusableInTouchMode="true"/>
<TextView
android:id="@+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:text="@string/Centimeter_To_Inches" />
<EditText
android:id="@+id/editText7"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="5dp"
android:ems="10"
android:inputType="numberDecimal|numberDecimal"
android:focusable="true"
android:focusableInTouchMode="true"/>
<Button
android:id="@+id/button1"
android:layout_width="292dp"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:text="@string/Convert" />
<Button
android:id="@+id/button2"
android:layout_width="290dp"
android:layout_height="wrap_content"
android:text="@string/Back" />
<Button
android:id="@+id/Clear"
android:layout_width="287dp"
android:layout_height="wrap_content"
android:text="@string/Clear" />
</LinearLayout>
</ScrollView>
enter code here