package com.example.fragmentexample;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class Fragment_1 extends Fragment{
OnFragmentChangedListener mCallback;
// Container Activity must implement this interface
public interface OnFragmentChangedListener {
public void onButtonClicked(String name);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
// This makes sure that the container activity has implemented
// the callback interface. If not, it throws an exception
try {
mCallback = (OnFragmentChangedListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnHeadlineSelectedListener");
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view = inflater.inflate(R.layout.fragment_fragment_1, container, false);
final EditText edtxtPersonName_Fragment = (EditText) view.findViewById(R.id.edtxtPersonName);
Button btnSayHi_Fragment = (Button) view.findViewById(R.id.btnSayHi);
btnSayHi_Fragment.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String name = edtxtPersonName_Fragment.getText().toString();
FragmentManager fm = getFragmentManager();
Fragment_2 f2 = (Fragment_2) fm.findFragmentById(R.id.fragment_content_2);
Activity activity = getActivity();
if(activity != null)
{
Toast.makeText(activity, "Say&ing Hi in Progress...", Toast.LENGTH_LONG).show();
}
if(f2 != null && f2.isInLayout())
{
f2.setName(name);
}
else
{
mCallback.onButtonClicked(name);
}
}
});
return view;
}
}
package com.example.fragmentexample;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Choreographer.FrameCallback;
import android.view.Menu;
public class MainActivity extends Activity implements Fragment_1.OnFragmentChangedListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
public void onButtonClicked(String name) {
// TODO Auto-generated method stub
Intent i = new Intent(this, SecondActivity.class);
i.putExtra("", name);
startActivity(i);
}
}
package com.example.fragmentexample;
import android.app.Activity;
import android.os.Bundle;
public class SecondActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
Bundle b = getIntent().getExtras();
Fragment_2 f2 = new Fragment_2();
f2.setArguments(b);
}
}
package com.example.fragmentexample;
import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class Fragment_2 extends Fragment{
View view;
TextView txtName;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
view = inflater.inflate(R.layout.fragment_fragment_2, container, false);
// Exception at this line
String name = getArguments().getString("message");
txtName = (TextView) view.findViewById(R.id.txtViewResult);
txtName.setText(name);
return view;
}
@Override
public void onAttach(Activity activity) {
// TODO Auto-generated method stub
super.onAttach(activity);
}
public void setName(String name)
{
txtName.setText("Hi " + name);
}
}
04-16 18:10:24.573: E/AndroidRuntime(713): FATAL EXCEPTION: main
04-16 18:10:24.573: E/AndroidRuntime(713): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.fragmentexample/com.example.fragmentexample.SecondActivity}: android.view.InflateException: Binary XML file line #8: Error inflating class fragment
04-16 18:10:24.573: E/AndroidRuntime(713): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1815)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1831)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.app.ActivityThread.access$500(ActivityThread.java:122)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1024)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.os.Handler.dispatchMessage(Handler.java:99)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.os.Looper.loop(Looper.java:132)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.app.ActivityThread.main(ActivityThread.java:4123)
04-16 18:10:24.573: E/AndroidRuntime(713): at java.lang.reflect.Method.invokeNative(Native Method)
04-16 18:10:24.573: E/AndroidRuntime(713): at java.lang.reflect.Method.invoke(Method.java:491)
04-16 18:10:24.573: E/AndroidRuntime(713): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
04-16 18:10:24.573: E/AndroidRuntime(713): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
04-16 18:10:24.573: E/AndroidRuntime(713): at dalvik.system.NativeStart.main(Native Method)
04-16 18:10:24.573: E/AndroidRuntime(713): Caused by: android.view.InflateException: Binary XML file line #8: Error inflating class fragment
04-16 18:10:24.573: E/AndroidRuntime(713): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:688)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.view.LayoutInflater.rInflate(LayoutInflater.java:724)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.view.LayoutInflater.inflate(LayoutInflater.java:479)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.view.LayoutInflater.inflate(LayoutInflater.java:391)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.view.LayoutInflater.inflate(LayoutInflater.java:347)
04-16 18:10:24.573: E/AndroidRuntime(713): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:223)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.app.Activity.setContentView(Activity.java:1786)
04-16 18:10:24.573: E/AndroidRuntime(713): at com.example.fragmentexample.SecondActivity.onCreate(SecondActivity.java:13)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.app.Activity.performCreate(Activity.java:4397)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1779)
04-16 18:10:24.573: E/AndroidRuntime(713): ... 11 more
04-16 18:10:24.573: E/AndroidRuntime(713): Caused by: java.lang.NullPointerException
04-16 18:10:24.573: E/AndroidRuntime(713): at com.example.fragmentexample.Fragment_2.onCreateView(Fragment_2.java:24)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:754)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:956)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.app.FragmentManagerImpl.addFragment(FragmentManager.java:1035)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.app.Activity.onCreateView(Activity.java:4177)
04-16 18:10:24.573: E/AndroidRuntime(713): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:664)
04-16 18:10:24.573: E/AndroidRuntime(713): ... 21 more
如何从secondactivity.java中的包到fragment_2.java文件中获取值?
在第一个片段中,输入以下代码:
editprofile.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Fragment_editprofile Fragment = new Fragment_editprofile();
.
.
.
Fragment.getintentdetails(tv_name.getText().toString(),
tv_mob.getText().toString(), tv_email.getText().toString(), tv_dob.getText().toString(),
tv_gender.getText().toString(), photointent);
}
});
在第二个片段中,创建一个如下所示的方法:
public void getintentdetails(String name, String mobile, String email, String dob,
String gender, String photointent) {
this.name_str = name;
this.mob_str = mobile;
this.email_str = email;
this.dob_str = dob;
this.gender_str = gender;
this.photo_str = photointent;
}
然后在类级别定义一个变量:
String name_str, mob_str, dob_str, photo_str, email_str, gender_str;
setexistingdetails();
private void setexistingdetails() {
if(!name_str.equalsIgnoreCase(""))
(et_name).setText(name_str);
if(!mob_str.equalsIgnoreCase(""))
et_mobile.setText(mob_str);
if(!email_str.equalsIgnoreCase(""))
email_et.setText(email_str);
if(!dob_str.equalsIgnoreCase(""))
dob_et.setText(dob_str);
if(!gender_str.equalsIgnoreCase("")) {
if (gender_str.equalsIgnoreCase("m")){
male_radio.setChecked(true);
}
else {
female_radio.setChecked(true);
}
}
if(!photo_str.equalsIgnoreCase("")) {
try {
Picasso.get().load(Const.BASE_PATH+"include/sub-domain/GENIUS/"+photo_str).into(adminpropic_edit);
}
catch (Exception e) {
}
}
}
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