无法解决以下代码中的错误：
public class MainActivity extends Activity implements LoginListener{
EditText et1;
private FBLoginManager fbLoginManager;
Button b;
//replace it with your own Facebook App ID
public final String FacebookTesting="218874471621782";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et1=(EditText)findViewById(R.id.editText1);
b=(Button)findViewById(R.id.button1);
connectToFacebook();
}
public void connectToFacebook(){
//read about Facebook Permissions here:
//http://developers.facebook.com/docs/reference/api/permissions/
String permissions[] = {
// "user_about_me",
// "user_activities",
// "user_birthday",
// "user_checkins",
// "user_education_history",
// "user_events",
// "user_groups",
// "user_hometown",
// "user_interests",
// "user_likes",
// "user_location",
// "user_notes",
// "user_online_presence",
// "user_photo_video_tags",
// "user_photos",
// "user_relationships",
// "user_relationship_details",
// "user_religion_politics",
// "user_status",
// "user_videos",
// "user_website",
// "user_work_history",
// "email",
//
// "read_friendlists",
// "read_insights",
// "read_mailbox",
// "read_requests",
// "read_stream",
// "xmpp_login",
// "ads_management",
// "create_event",
// "manage_friendlists",
// "manage_notifications",
// "offline_access",
// "publish_checkins",
"publish_stream",
// "rsvp_event",
// "sms",
//"publish_actions",
// "manage_pages"
};
fbLoginManager = new FBLoginManager(this,
R.layout.activity_main,
FacebookTesting,
permissions);
if(fbLoginManager.existsSavedFacebook()){
fbLoginManager.loadFacebook();
}
else{
fbLoginManager.login();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, android.content.Intentdata){
fbLoginManager.loginSuccess(data);
}
public void loginSuccess(Facebook facebook) {
// GraphApi graphApi = new GraphApi(facebook);
new getDataBackgroundThread().execute(facebook);
// User user = new User();
//
// try{
// user = graphApi.getMyAccountInfo();
//
// //update your status if logged in
// graphApi.setStatus("Hello, world!");
// } catch(EasyFacebookError e){
// Log.d("TAG: ", e.toString());
// }
// fbLoginManager.displayToast("Hey, " + user.getFirst_name() + "! Login success!");
}
@Override
public void logoutSuccess() {
// TODO Auto-generated method stub
}
@Override
public void loginFail() {
// TODO Auto-generated method stub
}
class getDataBackgroundThread extends AsyncTask<Facebook, Void, String> {
private Exception exception;
protected String doInBackground(Facebook... urls) {
try{
GraphApi graphApi = new GraphApi(urls[0]);
User user = new User();
try{
// user = graphApi.getMyAccountInfo();
//update your status if logged in
//graphApi.setStatus("My android App "+"VivekAppTest");
graphApi.setStatus(et1+"VivekAppTest");
} catch(EasyFacebookError e){
Log.d("TAG: ", e.toString());
}
return "posted";
}
catch (Exception e) {
// TODO: handle exception
return null;
}
}
protected void onPostExecute(String ipr) {
// TODO: check this.exception
// TODO: do something with the feed
//
// Intent i=new Intent(getApplicationContext(),MainActivity.class);
// startActivity(i);
// finish();
Toast toast=Toast.makeText(getApplicationContext(),"Post Successful !", 1);
toast.setGravity(Gravity.TOP|Gravity.CENTER_HORIZONTAL,0, 130);
toast.show();
}
}
}
LOGCAT：
10-17 20:25:05.623: E/AndroidRuntime(401): FATAL EXCEPTION: main
10-17 20:25:05.623: E/AndroidRuntime(401): java.lang.IllegalStateException: Could not find a method (View) in the activity class com.example.facebooktesting.MainActivity for onClick handler on view class android.widget.Button with id 'button1'
10-17 20:25:05.623: E/AndroidRuntime(401): at android.view.View$1.onClick(View.java:2059)
10-17 20:25:05.623: E/AndroidRuntime(401): at android.view.View.performClick(View.java:2408)
10-17 20:25:05.623: E/AndroidRuntime(401): at android.view.View$PerformClick.run(View.java:8816)
10-17 20:25:05.623: E/AndroidRuntime(401): at android.os.Handler.handleCallback(Handler.java:587)
10-17 20:25:05.623: E/AndroidRuntime(401): at android.os.Handler.dispatchMessage(Handler.java:92)
10-17 20:25:05.623: E/AndroidRuntime(401): at android.os.Looper.loop(Looper.java:123)
10-17 20:25:05.623: E/AndroidRuntime(401): at android.app.ActivityThread.main(ActivityThread.java:4627)
10-17 20:25:05.623: E/AndroidRuntime(401): at java.lang.reflect.Method.invokeNative(Native Method)
10-17 20:25:05.623: E/AndroidRuntime(401): at java.lang.reflect.Method.invoke(Method.java:521)
10-17 20:25:05.623: E/AndroidRuntime(401): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-17 20:25:05.623: E/AndroidRuntime(401): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-17 20:25:05.623: E/AndroidRuntime(401): at dalvik.system.NativeStart.main(Native Method)
10-17 20:25:05.623: E/AndroidRuntime(401): Caused by: java.lang.NoSuchMethodException:
10-17 20:25:05.623: E/AndroidRuntime(401): at java.lang.ClassCache.findMethodByName(ClassCache.java:308)
10-17 20:25:05.623: E/AndroidRuntime(401): at java.lang.Class.getMethod(Class.java:985)
10-17 20:25:05.623: E/AndroidRuntime(401): at android.view.View$1.onClick(View.java:2052)
10-17 20:25:05.623: E/AndroidRuntime(401): ... 11 more
10-17 20:25:10.590: I/Process(401): Sending signal. PID: 401 SIG: 9
答案 0 :(得分：0)
在日志中：
IllegalStateException：无法在活动中找到方法（View） 类
表示您忘记在MainActivity类中定义已添加为button1布局中activity_main.xml作为android:onClick的回调的方法。像在MainActivity中一样添加它：
public void button1_Click(View view) {
// TODO Auto-generated method stub
// on button1 click
}