在android中使用BaseActivity在不同活动中使用公共头部
在android中使用BaseActivity在不同活动中使用公共头部
提问于 2012-07-20 20:43:19
我想写一次代码，并在不同的活动中使用。我已经为此创建了一个Base Activity class。此外，不同活动中所有布局的标题也是相同的。我在<include layout >标签的帮助下做到了这一点。
现在的问题是我的BaseActivity代码没有运行。这是我第一次尝试，她对此并不是很了解。
1.) BaseActivity代码如下：
package com.waheguru.app;
import android.R.integer;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public abstract class BaseActivityMenu extends Activity {
//action id
private static final int ID_UP = 1;
private static final int ID_DOWN = 2;
private static final int ID_SEARCH = 3;
private static final int ID_INFO = 4;
private static final int ID_ERASE = 5;
private static final int ID_OK = 6;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.header);
ActionItem nextItem = new ActionItem(ID_DOWN, "Book", getResources().getDrawable(R.drawable.menu_down_arrow));
ActionItem prevItem = new ActionItem(ID_UP, "Bookmark", getResources().getDrawable(R.drawable.menu_up_arrow));
ActionItem searchItem = new ActionItem(ID_SEARCH, "Find", getResources().getDrawable(R.drawable.menu_search));
ActionItem infoItem = new ActionItem(ID_INFO, "Info", getResources().getDrawable(R.drawable.menu_info));
ActionItem eraseItem = new ActionItem(ID_ERASE, "Clear", getResources().getDrawable(R.drawable.menu_eraser));
ActionItem okItem = new ActionItem(ID_OK, "OK", getResources().getDrawable(R.drawable.menu_ok));
//use setSticky(true) to disable QuickAction dialog being dismissed after an item is clicked
prevItem.setSticky(true);
nextItem.setSticky(true);
//create QuickAction. Use QuickAction.VERTICAL or QuickAction.HORIZONTAL param to define layout
//orientation
final QuickAction quickAction = new QuickAction(this, QuickAction.VERTICAL);
//add action items into QuickAction
quickAction.addActionItem(nextItem);
quickAction.addActionItem(prevItem);
quickAction.addActionItem(searchItem);
quickAction.addActionItem(infoItem);
quickAction.addActionItem(eraseItem);
quickAction.addActionItem(okItem);
//Set listener for action item clicked
quickAction.setOnActionItemClickListener(new QuickAction.OnActionItemClickListener() {
public void onItemClick(QuickAction source, int pos, int actionId) {
ActionItem actionItem = quickAction.getActionItem(pos);
//here we can filter which action item was clicked with pos or actionId parameter
if (actionId == ID_SEARCH) {
Toast.makeText(getApplicationContext(), "Let's do some search action", Toast.LENGTH_SHORT).show();
} else if (actionId == ID_INFO) {
Toast.makeText(getApplicationContext(), "I have no info this time", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), actionItem.getTitle() + " selected", Toast.LENGTH_SHORT).show();
}
}
});
//set listnener for on dismiss event, this listener will be called only if QuickAction dialog was dismissed
//by clicking the area outside the dialog.
quickAction.setOnDismissListener(new QuickAction.OnDismissListener() {
public void onDismiss() {
Toast.makeText(getApplicationContext(), "Dismissed", Toast.LENGTH_SHORT).show();
}
});
Button books=(Button)findViewById(R.id.book);
books.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent intent=new Intent(ExampleActivity.this,List_of_books.class);
startActivityForResult(intent, 0);
}
});
//show on btn1
Button btn1 = (Button) this.findViewById(R.id.menu);
btn1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
quickAction.show(v);
}
});
}
}2.)此活动扩展了基本活动
package com.waheguru.app;
import android.app.Activity;
import android.os.Bundle;
public class ABCActivity extends BaseActivityMenu {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
}
}所以，如果我做错了什么，任何人都可以帮助我。
回答 2
Stack Overflow用户
回答已采纳
发布于 2012-07-20 20:55:35
为此，您必须创建一个header.xml，它将包含在活动的每个布局中，如下所示
header.xml
<RelativeLayout>
<TextView android:id="@+id/txtHeading"
.... />
</RelativeLayout>activity_main.xml
<RelativeLayout>
<!-- include your header here -->
<include layout="@layout/header"
... />
<!-- Rest of your views -->
</RelativeLayout>BaseActivity
abstract class BaseActivity extends Activity {
protected TextView txtHeading;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
protected void setHeading(int resId) {
if(txtHeading == null)
txtHeading = findViewById(R.id.txtHeading);
if(txtHeading != null)
txtHeading.setText(resId);
}
}MainActivity
class MainActivity extends BaseActivity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setHeading(R.string.heading_main);
}
}您可以在BaseActivity或BaseListActivity中放置任意数量的视图，并管理常见的内容。
Stack Overflow用户
发布于 2012-07-20 20:59:54
我认为你应该使用Fragment来实现它，这可能会对你有所帮助。
1-在main.xml中，添加：
<fragment
android:id="@+id/header"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
class="com.package.name.HeaderPanel" />
//remaining is same 2-扩展FragmentActivity的BaseActivity
public class BaseActivityMenu extends FragmentActivity {
private static final String TAG = Default.class.getName() + " - ";
private int mResLayoutId;
public void onCreate(Bundle savedInstanceState, int resLayout){
super.onCreate(savedInstanceState);
setContentView(resLayout);
mResLayoutId = resLayout;
switch(mResLayoutId){
// here change with your xml file
case R.layout.home:
// set here common control like header textview
break;
default:
break;
}
}
}3-现在，您可以使用BaseActivity扩展您的Activity。这将允许FragmentActivity扩展Activity：
public class ABCActivity extends BaseActivityMenu {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState, R.layout.home);
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/11579635
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