Question

我尝试了两种类型的代码来实现这一点，当我按下按钮进入另一个Activity时，它会一直强制关闭。我正在使用Fragment并且片段代码中有一个按钮，但我似乎无法让它工作。

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.androidbelieve.activity.LoginActivity;
import com.androidbelieve.helper.SQLiteHandler;
import com.androidbelieve.helper.SessionManager;

import java.util.HashMap;

public class PrimaryFragment extends Fragment {

private TextView txtName;
private Button btnLogout;

private SQLiteHandler db;
private SessionManager session;

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    RelativeLayout rootView = (RelativeLayout) inflater.inflate(R.layout.primary_layout, container, false);

    txtName = (TextView) rootView.findViewById(R.id.username);
    btnLogout = (Button) rootView.findViewById(R.id.logout);

    // SqLite database handler
    db = new SQLiteHandler(getActivity().getApplicationContext());

    // session manager
    session = new SessionManager(getActivity().getApplicationContext());

    if (!session.isLoggedIn()) {
        logoutUser();
    }
    // Fetching user details from SQLite
    HashMap<String, String> user = db.getUserDetails();

    String name = user.get("name");

    // Displaying the user details on the screen
    txtName.setText(name);


    // Logout button click event
    btnLogout.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            logoutUser();
        }


    });

    Button button = (Button) rootView.findViewById(R.id.saleentry);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            updateDetail();
        }
    });
    return rootView;
}

public void updateDetail() {
    Intent intent = new Intent(getActivity(), SentFragment.class);
    startActivity(intent);
}

我试图使用按钮转到另一个页面，但它总是失败 这是我的stacktrace ..这是我使用onclicklistener时的结果

04-07 22：42：37.285 27777-27777 / com.androidbelieve.drawerwithswipetabs＆gt; E / AndroidRuntime：FATAL EXCEPTION：main 过程：com.androidbelieve.drawerwithswipetabs，PID：27777 主题：主题：{default = overlay：system，iconPack：system，fontPkg：system，＆gt; com.android.systemui = overlay：system} android.content.ActivityNotFoundException：无法找到明确的＆gt;活动类＆gt; {com.androidbelieve.drawerwithswipetabs / com.androidbelieve.drawerwithswipet＆gt; abs.SentFragment};你在＆gt; AndroidManifest.xml中声明了这个活动吗？在android.app.Instrumentation.checkStartActivityResult（Instrumentation.java:1801）在android.app.Instrumentation.execStartActivity（Instrumentation.java:1514）在android.app.Activity.startActivityForResult（Activity.java:3930）在android.app.Activity.startActivityForResult（Activity.java:3890）在android.support.v4.app.FragmentActivity.startActivityFromFragment（FragmentActivity.java:849）在android.support.v4.app.FragmentActivity $ HostCallbacks.onStartActivityFromFragment（FragmentActivity.java:907）在android.support.v4.app.Fragment.startActivity（Fragment.java:916）在com.androidbelieve.drawerwithswipetabs.PrimaryFragment.updateDetail（PrimaryFragment.java:75）在com.androidbelieve.drawerwithswipetabs.PrimaryFragment $ 2.onClick（PrimaryFragment.java:67）在android.view.View.performClick（View.java:5204）在android.view.View $ PerformClick.run（View.java:21156）在android.os.Handler.handleCallback（Handler.java:739）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:148）在android.app.ActivityThread.main（ActivityThread.java:5456） at java.lang.reflect.Method.invoke（Native Method）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:726）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:616）

Answer 1

首先，您必须在xml布局中添加框架布局。

<FrameLayout
    android:id="@+id/frame_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    />

然后点击

使用此代码

 Button button = (Button) rootView.findViewById(R.id.saleentry);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {           
           Fragment fragment = new SentFragment();
            FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
            FragmentTransaction fragmentTransaction =        fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.content_frame, fragment);
            fragmentTransaction.remove(new PrimaryFragment ());
            fragmentTransaction.addToBackStack(null);
            fragmentTransaction.commit();
            }
        });

片段

1 个答案: