在 MainyActivity.java 中设置搜索和设置代码时出错
Error in setting Search and Settings code in MainyActivity.java
我是 Android Studio 的新手。我正在通过 developer.android.com 学习编程。我正在添加操作栏,但现在我遇到了错误。
`
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle presses on the action bar items
switch (item.getItemId()) {
case R.id.action_search:
private void openSearch() {
Toast.makeText(this, "Search button pressed", Toast.LENGTH_SHORT).show();
}
return true;
case R.id.action_settings:
private void openSettings() {
startActivityForResult(new Intent(android.provider.Settings.ACTION_SETTINGS), 0);
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
这是我的代码,在 openSearch()
和 openSettings()
之后,我在添加 ';' 时遇到错误,但是当我添加它时,它再次显示预期的表达式。请尽快帮助我。提前致谢!
这是因为您正在 switch case 中创建方法。
把方法拉出来,直接在里面用,像这样:
private void openSearch() {
Toast.makeText(this, "Search button pressed", Toast.LENGTH_SHORT).show();
}
private void openSettings() {
startActivityForResult(new Intent(android.provider.Settings.ACTION_SETTINGS), 0);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle presses on the action bar items
switch (item.getItemId()) {
case R.id.action_search:
openSearch();
return true;
case R.id.action_settings:
openSettings();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
我是 Android Studio 的新手。我正在通过 developer.android.com 学习编程。我正在添加操作栏,但现在我遇到了错误。
`
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle presses on the action bar items
switch (item.getItemId()) {
case R.id.action_search:
private void openSearch() {
Toast.makeText(this, "Search button pressed", Toast.LENGTH_SHORT).show();
}
return true;
case R.id.action_settings:
private void openSettings() {
startActivityForResult(new Intent(android.provider.Settings.ACTION_SETTINGS), 0);
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
这是我的代码,在 openSearch()
和 openSettings()
之后,我在添加 ';' 时遇到错误,但是当我添加它时,它再次显示预期的表达式。请尽快帮助我。提前致谢!
这是因为您正在 switch case 中创建方法。
把方法拉出来,直接在里面用,像这样:
private void openSearch() {
Toast.makeText(this, "Search button pressed", Toast.LENGTH_SHORT).show();
}
private void openSettings() {
startActivityForResult(new Intent(android.provider.Settings.ACTION_SETTINGS), 0);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle presses on the action bar items
switch (item.getItemId()) {
case R.id.action_search:
openSearch();
return true;
case R.id.action_settings:
openSettings();
return true;
default:
return super.onOptionsItemSelected(item);
}
}