我正在尝试将值从对话框中的编辑文本传递到同一活动的文本视图。 我正在使用2个单独的xml文件进行对话和活动。
运行我的代码时，我收到的错误是无法将编辑文本转换为文本视图： 请让我知道我做错了什么......
我的代码：
public class Water extends Activity implements OnClickListener{
Button water, date;
private DatePicker date_picker;
static final int DATE_DIALOG_ID = 100;
private static final int DIALOG_TEXT_ENTRY_LOG = 1;
SimpleDateFormat formatter;
String result;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView (R.layout.diary_water);
initialize();
water.setOnClickListener(this);
final Calendar calendar = Calendar.getInstance();
formatter = new SimpleDateFormat("EEE, MMM d, yyyy");
// 3-lettermonth name & 2-char day of month
date.setText(formatter.format(calendar.getTime()));
}
private void initialize() {
// TODO Auto-generated method stub
water = (Button) findViewById(R.id.bGlassOfWater);
date = (Button) findViewById(R.id.bDateWater);
}
@SuppressWarnings("deprecation")
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.bDateWater:
break;
case R.id.bGlassOfWater:
showDialog (DIALOG_TEXT_ENTRY_LOG);
break;
}
}
@Override
public Dialog onCreateDialog(int id) {
switch (id) {
case DIALOG_TEXT_ENTRY_LOG:
LayoutInflater wat = LayoutInflater.from(this);
final View textEntryViewAcc = wat.inflate(R.layout.glass_of_water, null);
return new AlertDialog.Builder(Water.this)
//.setIconAttribute(android.R.attr.alertDialogIcon)
.setTitle(R.string.Water)
.setView(textEntryViewAcc)
.setPositiveButton(R.string.alert_dialog_save,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
/* User clicked OK so do some stuff */
LayoutInflater wat = LayoutInflater.from(Water.this);
final EditText glwat= (EditText) ((EditText) dialog).findViewById(R.id.etGlasesOfWater);
result = glwat.getText().toString();
TextView tvwater = (TextView)findViewById(R.id.tvGlassOfWater);
tvwater.setText(result);
}
})
.setNegativeButton(R.string.alert_dialog_cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
/* User clicked cancel so do some stuff */
dialog.dismiss();
}
})
.create();
}
return null;
}
}
Dialog XML：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<EditText
android:id="@+id/etGlasesOfWater"
android:layout_width="173dp"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginRight="27dp"
android:layout_marginTop="25dp"
android:layout_toLeftOf="@+id/tvGlasses"
android:ems="10"
android:gravity="center_horizontal"
android:scrollHorizontally="true"
android:textAppearance="?android:attr/textAppearanceMedium" >
<requestFocus />
</EditText>
<TextView
android:id="@+id/tvGlasses"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/etGlasesOfWater"
android:layout_alignBottom="@+id/etGlasesOfWater"
android:layout_alignParentRight="true"
android:layout_marginRight="19dp"
android:gravity="left"
android:text="glasses"
android:textAppearance="?android:attr/textAppearanceMedium" />
</RelativeLayout>
主要活动XML：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="top"
android:background="@drawable/ic_gradient_blue_3"
android:orientation="vertical" >
<TextView
android:id="@+id/tvTrackIt"
android:layout_width="wrap_content"
android:layout_height="40sp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="@drawable/ic_green_diary"
android:gravity="center_vertical|left"
android:paddingLeft="60sp"
android:text="@string/Track"
android:textSize="20sp"
android:textStyle="bold|italic" />
<Button
android:id="@+id/bDateWater"
android:layout_width="150dp"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/tvTrackIt"
android:text="" />
<Button
android:id="@+id/bDone"
android:layout_width="310dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:background="@drawable/done_but_gradient"
android:text="Done"
android:textStyle="bold"
android:layout_marginBottom="4dp"/>
<TextView
android:id="@+id/tvGlassOfWater"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/bGlassOfWater"
android:layout_centerHorizontal="true"
android:text=""
android:textStyle="bold"/>
<Button
android:id="@+id/bGlassOfWater"
android:layout_width="230dp"
android:layout_height="130dp"
android:layout_below="@+id/bDateWater"
android:layout_centerHorizontal="true"
android:background="@drawable/ic_water_glass"
android:gravity="top|center_horizontal"
android:text="Amount of Water"
android:textStyle="bold|italic" />
</RelativeLayout>
记录结果：
10-25 16:01:07.648: E/AndroidRuntime(5305): FATAL EXCEPTION: main
10-25 16:01:07.648: E/AndroidRuntime(5305): java.lang.ClassCastException: android.app.AlertDialog cannot be cast to android.widget.EditText
10-25 16:01:07.648: E/AndroidRuntime(5305): at com.margaret.app.easypeasycooking.Water$1.onClick(Water.java:86)
10-25 16:01:07.648: E/AndroidRuntime(5305): at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:166)
10-25 16:01:07.648: E/AndroidRuntime(5305): at android.os.Handler.dispatchMessage(Handler.java:99)
10-25 16:01:07.648: E/AndroidRuntime(5305): at android.os.Looper.loop(Looper.java:137)
10-25 16:01:07.648: E/AndroidRuntime(5305): at android.app.ActivityThread.main(ActivityThread.java:5103)
10-25 16:01:07.648: E/AndroidRuntime(5305): at java.lang.reflect.Method.invokeNative(Native Method)
10-25 16:01:07.648: E/AndroidRuntime(5305): at java.lang.reflect.Method.invoke(Method.java:525)
10-25 16:01:07.648: E/AndroidRuntime(5305): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
10-25 16:01:07.648: E/AndroidRuntime(5305): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-25 16:01:07.648: E/AndroidRuntime(5305): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：0)
检查您的xml，看起来tvGlassOfWater是EditText，但您尝试在Java代码中强制转换为TextView。
TextView tvwater = (TextView)findViewById(R.id.tvGlassOfWater);
如果您的xml文件中有TextView，请发布您的logcat和相关的xml代码。
答案 1 :(得分：0)
解决方案： 不得不在代码的前面定义编辑文本，然后很容易调整正面按钮：
@Override
public Dialog onCreateDialog(int id) {
switch (id) {
case DIALOG_TEXT_ENTRY_LOG:
LayoutInflater wat = LayoutInflater.from(this);
final View textEntryViewAcc = wat.inflate(R.layout.glass_of_water, null);
final EditText glwater = (EditText) textEntryViewAcc.findViewById(R.id.etGlasesOfWater);
return new AlertDialog.Builder(Water.this)
//.setIconAttribute(android.R.attr.alertDialogIcon)
.setTitle(R.string.Water)
.setView(textEntryViewAcc)
.setPositiveButton(R.string.alert_dialog_save,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
String result = glwater.getText().toString();
TextView tvwater = (TextView)findViewById(R.id.tvGlassOfWater);
tvwater.setText(result);
感谢@codeMagic寻求帮助：）
答案 2 :(得分：0)
因为您向Dialog投了EditText。请尝试这种方式。
final EditText edit = (EditText)dialog.findViewById(R.id.editText);
final TextView text = (TextView)dialog.findViewById(R.id.textView);