//my Eula.java file...
//Gets the Eula file from assests folder...
class Eula {
private static final String ASSET_EULA = "EULA";
private static final String PREFERENCE_EULA_ACCEPTED = "eula.accepted";
private static final String PREFERENCES_EULA = "eula";
static interface OnEulaAgreedTo {
void onEulaAgreedTo();
}
static boolean show(final Activity activity)
{
final SharedPreferences preferences = activity.getSharedPreferences(PREFERENCES_EULA,
Activity.MODE_PRIVATE);
if (!preferences.getBoolean(PREFERENCE_EULA_ACCEPTED, false))
{
final CustomDialog.Builder builder = new CustomDialog.Builder(activity);
builder.setTitle(R.string.app_name1);
//builder.setCancelable(true);
builder.setPositiveButton(R.string.eula_accept, new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
accept(preferences);
/*if(activity instanceof OnEulaAgreedTo)
{
((OnEulaAgreedTo) activity).onEulaAgreedTo();
}*/
dialog.dismiss();
}
});
builder.setNegativeButton(R.string.eula_refuse, new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which) {
refuse(activity);
}
});
CharSequence s = readEula(activity);
builder.setMessage(s.toString());
builder.create().show();
return false;
}
return true;
}
private static void accept(SharedPreferences preferences) {
preferences.edit().putBoolean(PREFERENCE_EULA_ACCEPTED, true).commit();
}
private static void refuse(Activity activity) {
activity.finish();
}
private static CharSequence readEula(Activity activity) {
BufferedReader in = null;
try {
in = new BufferedReader(new InputStreamReader(activity.getAssets().open(ASSET_EULA)));
String line;
StringBuilder buffer = new StringBuilder();
while ((line = in.readLine()) != null) buffer.append(line).append('\n');
return buffer;
} catch (IOException e) {
return "";
} finally {
closeStream(in);
}
}
private static void closeStream(Closeable stream) {
if (stream != null) {
try {
stream.close();
} catch (IOException e) {
}
}
}
}
然后我有我的CustomDialog文件
//my CustomDialog.java file...
public class CustomDialog extends Dialog {
private static final String ASSET_EULA = "EULA";
public CustomDialog(Context context, int theme) {
super(context, theme);
}
public CustomDialog(Context context) {
super(context);
}
public static class Builder {
private Context context;
private String title;
private String message;
private String positiveButtonText;
private String negativeButtonText;
//private String cancelButtonText;
private View contentView;
private DialogInterface.OnClickListener
positiveButtonClickListener,
negativeButtonClickListener;
public Builder(Context context) {
this.context = context;
}
public Builder setMessage(String message) {
this.message = message;
return this;
}
public Builder setMessage(int message) {
this.message = (String) context.getText(message);
return this;
}
public Builder setTitle(int title) {
this.title = (String) context.getText(title);
return this;
}
public Builder setTitle(String title) {
this.title = title;
return this;
}
public Builder setContentView(View v) {
this.contentView = v;
return this;
}
public Builder setPositiveButton(int positiveButtonText,
DialogInterface.OnClickListener listener) {
this.positiveButtonText = (String) context
.getText(positiveButtonText);
this.positiveButtonClickListener = listener;
return this;
}
public Builder setPositiveButton(String positiveButtonText,
DialogInterface.OnClickListener listener) {
this.positiveButtonText = positiveButtonText;
this.positiveButtonClickListener = listener;
return this;
}
public Builder setNegativeButton(int negativeButtonText,
DialogInterface.OnClickListener listener) {
this.negativeButtonText = (String) context
.getText(negativeButtonText);
this.negativeButtonClickListener = listener;
return this;
}
public Builder setNegativeButton(String negativeButtonText,
DialogInterface.OnClickListener listener) {
this.negativeButtonText = negativeButtonText;
this.negativeButtonClickListener = listener;
return this;
}
public CustomDialog create() {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// instantiate the dialog with the custom Theme
final CustomDialog dialog = new CustomDialog(context,
R.style.Dialog);
View layout = inflater.inflate(R.layout.dialog, null);
dialog.addContentView(layout, new LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
// set the dialog title
((TextView) layout.findViewById(R.id.title)).setText(title);
// set the confirm button
if (positiveButtonText != null)
{
((Button) layout.findViewById(R.id.positiveButton)).setText(positiveButtonText);
if (positiveButtonClickListener != null)
{
((Button) layout.findViewById(R.id.positiveButton)).setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
positiveButtonClickListener.onClick(dialog, DialogInterface.BUTTON_POSITIVE);
}
});
}
} else {
// if no confirm button just set the visibility to GONE
layout.findViewById(R.id.positiveButton).setVisibility(
View.GONE);
}
// set the cancel button
if (negativeButtonText != null) {
((Button) layout.findViewById(R.id.negativeButton))
.setText(negativeButtonText);
if (negativeButtonClickListener != null) {
((Button) layout.findViewById(R.id.negativeButton))
.setOnClickListener(new View.OnClickListener() {
public void onClick(View v)
{
negativeButtonClickListener.onClick(dialog, DialogInterface.BUTTON_NEGATIVE);
}
});
}
} else {
// if no confirm button just set the visibility to GONE
layout.findViewById(R.id.negativeButton).setVisibility(
View.GONE);
}
// set the content message
if (message != null) {
((TextView) layout.findViewById(
R.id.message)).setText(message);
} else if (contentView != null) {
// if no message set
// add the contentView to the dialog body
((LinearLayout) layout.findViewById(R.id.content))
.removeAllViews();
((LinearLayout) layout.findViewById(R.id.content))
.addView(contentView,
new LayoutParams(
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
}
dialog.setContentView(layout);
return dialog;
}
public void dismiss()
{
this.dismiss();
}
public void setCancelable(boolean b) {
// TODO Auto-generated method stub
this.setCancelable(true);
}
}
}
Atfirst，eula.java文件的onClickfor setPositive按钮就像
public void onClick(DialogInterface dialog, int which)
{
accept(preferences);
if(activity instanceof OnEulaAgreedTo)
{
((OnEulaAgreedTo) activity).onEulaAgreedTo();
}
}
它适用于内置的AlertDialog。但是当我用我的自定义对话框更改它时，该编码总是会导致错误...
有谁能告诉我这段代码的用途是什么？
答案 0 :(得分：1)
问题可能出在以下情况。请检查活动实例是否符合条件？
if(activity instanceof OnEulaAgreedTo)
{
((OnEulaAgreedTo) activity).onEulaAgreedTo();
}
答案 1 :(得分：1)
对于消失的对话框，您应该使用Dialog.dismiss()。您可以在正按钮行为结束时关闭对话框。
当您点击拒绝按钮时，您就完成了活动，这就是您对话解除的原因。