我正在使用带有三个项目的导航抽屉(时间表,声明,项目),我想将ab
传递给声明。在时间表中我有3个活动,ab
在work_details活动中。如何实现这一目标?
TimeSheet有3个活动(信息(扩展到片段),劳动力,工作细节)
声明有2项活动(声明(扩展到片段),cameraMain)。
WorkDetails.java
Button btn1 = (Button) findViewById(R.id.button2);
btn1.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
AlertDialog.Builder builder = new AlertDialog.Builder(WorkDetailsTable.this);
builder.setTitle("Data Saved");
builder.setMessage("Are you sure you want to save?");
builder.setIcon(android.R.drawable.ic_dialog_alert);
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int ii) {
long ab = ts.insertTimeSheet(name, weather, date, status,b,i);
Bundle bundle =new Bundle();
bundle.putString("ab","ab");
Claims o=new Claims();
o.setArguments(bundle);
}
Claims.java
final Long fk=this.getArguments().getLong("ab");
Button button = (Button) claims.findViewById(R.id.button8);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Intent intent = new Intent(getActivity().getApplicationContext(), CameraMain.class);
Toast.makeText(getActivity().getApplicationContext(), fk+"", Toast.LENGTH_LONG).show();
startActivity(intent);
}
});
return claims;
}
我从Send data from activity to fragment in android引用,但是当我选择声明项时应用程序崩溃了。
11-02 09:25:55.910 6116-6116 / com.example.project.project E / AndroidRuntime:致命异常:主要 处理:com.example.project.project,PID:6116 显示java.lang.NullPointerException 在com.example.project.project.Claims.onCreateView(Claims.java:59) 在android.app.Fragment.performCreateView(Fragment.java:1700) 在android.app.FragmentManagerImpl.moveToState(FragmentManager.java:890) 在android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1062) 在android.app.BackStackRecord.run(BackStackRecord.java:684) 在android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1453)
我认为NullPointException来自这里
FK = data.getLong(" AB&#34);
我是否需要在MainActivity中添加参数?
MainActivity.java
mainActivity中的部分代码段
private void selectItem(int position) {
Fragment fragment = null;
switch (position) {
case 0:
fragment=new Information();
break;
case 1:
fragment=new Claims();
break;
case 2:
fragment=new Project();
case 3:
fragment=new Report();
case 4:
fragment=new ViewView();
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(mNavigationDrawerItemTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
} else {
Log.e("MainActivity", "Error in creating fragment");
}
EDITED
Button btn1 = (Button) findViewById(R.id.button2);
btn1.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
AlertDialog.Builder builder = new AlertDialog.Builder(WorkDetailsTable.this);
builder.setTitle("Data Saved");
builder.setMessage("Are you sure you want to save?");
builder.setIcon(android.R.drawable.ic_dialog_alert);
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int ii) {
long ab = ts.insertTimeSheet(name, weather, date, status,b,i);
Bundle bundle =new Bundle();
bundle.putLong("ab",ab);
Claims o=new Claims();
o.setArguments(bundle);
}
Claims.java
Bundle bundle=this.getArguments();
fk=bundle.getLong("ab");
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getActivity().getApplicationContext(), fk+"", Toast.LENGTH_LONG).show();
AlertDialogRadio(a1);
}
});
MainActivity
private void selectItem(int position) {
Fragment fragment = null;
switch (position) {
case 0:
fragment=new Information();
break;
case 1:
fragment=new Claims();
break;
case 2:
fragment=new Project();
break;
case 3:
fragment=new Report();
break;
case 4:
fragment=new ViewView();
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getFragmentManager();
if(fragment instanceof Claims)
{
Bundle bundle=new Bundle();
bundle.putString("ab","ab");
fragment.setArguments(bundle);
fragment.setArguments(bundle);
}
fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(mNavigationDrawerItemTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
} else {
Log.e("MainActivity", "Error in creating fragment");
}
}
}
答案 0 :(得分:1)
<强> MainActivity 强>
private void selectItem(int position) {
Fragment fragment = null;
switch (position) {
case 0:
fragment=new Information();
break;
case 1:
fragment=new Claims();
Bundle bundle=new Bundle();
bundle.putLong("ab",WorkDetails.ab);
fragment.setArguments(bundle);
break;
case 2:
fragment=new Project();
break;
case 3:
fragment=new Report();
break;
case 4:
fragment=new ViewView();
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(mNavigationDrawerItemTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
} else {
Log.e("MainActivity", "Error in creating fragment");
}
}
}
WorkDetails
public static long ab=-1;//this is flied ,don't put in the method
Button btn1 = (Button) findViewById(R.id.button2);
btn1.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
AlertDialog.Builder builder = new AlertDialog.Builder(WorkDetailsTable.this);
builder.setTitle("Data Saved");
builder.setMessage("Are you sure you want to save?");
builder.setIcon(android.R.drawable.ic_dialog_alert);
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int ii) {
ab = ts.insertTimeSheet(name, weather, date, status,b,i);
}
答案 1 :(得分:1)
您可以做的是将此数据放在放置片段的活动中。例如。
在你的活动中 长ab = 12.4;
在你的片段中 long data =((YourActivity)getActivity())。ab;
"OR"
使ab喜欢
static long ab = value; // your Details activity
在您的详细信息活动中获取此
的值详细活动名称如
long data = Details.ab //in your claims activity.
答案 2 :(得分:0)
当您实例化您的Claim Fragment时,实例化一个bundle对象并分配您需要在bundle中传递的任何数据,并将其设置为该片段的参数。
Bundle bundle = new Bundle();
bundle.putLong("ab",10L);
new Claims().setargument(bundle);
然后在您的声明片段的onCreateView()中,您可以访问此捆绑数据
Bundle bundle = getArguments();
long ab = bundle.getLong("ab");