开始一个新的活动Android OnClickListener

Question

I am having trouble with using OnClickListener. I am trying to start a new activity when the user presses one of the buttons in my floating action button. My app just crashes right when I run it.

In my LaunchActivity.java:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_launch);

    final Button buttonNote = (Button) findViewById(R.id.note);

    buttonNote.setOnClickListener(new View.OnClickListener(){
        public void onClick(View v){
            startActivity(new Intent(LaunchActivity.this, CreateNote.class));
        }
    });
}

In my activity_launch.xml:

<com.getbase.floatingactionbutton.FloatingActionsMenu
    android:id="@+id/create"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentEnd="true"
    fab:fab_addButtonColorNormal="@color/accent"
    fab:fab_addButtonColorPressed="@color/accent_dark"
    fab:fab_addButtonPlusIconColor="@color/window_background"
    fab:fab_labelStyle="@style/menu_labels_style"
    android:layout_marginBottom="16dp"
    android:layout_marginEnd="16dp">
    <com.getbase.floatingactionbutton.FloatingActionButton
        android:id="@+id/note"
        android:src="@drawable/ic_note"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:paddingBottom="16dp"
        fab:fab_title="@string/note"
        fab:fab_colorNormal="@color/accent"
        fab:fab_colorPressed="@color/accent_dark"/>
</com.getbase.floatingactionbutton.FloatingActionsMenu>

CreateNote.java:

public class CreateNote extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_create_note);
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_create_note, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}
}

Thank you for any help, this is my first app.

Answer 1

try this

findViewById(R.id.note).setOnClickListener(new OnClickListener() {
  @Override
  public void onClick(View v) {
    startActivity(new Intent(LaunchActivity.this, CreateNote.class));
  }
});

instead

final Button buttonNote = (Button) findViewById(R.id.note);

buttonNote.setOnClickListener(new View.OnClickListener(){
    public void onClick(View v){
        startActivity(new Intent(LaunchActivity.this, CreateNote.class));
    }
});

hope it help

Answer 2

请在此处分享您的logcat错误。并尝试将对象从Button更改为com.getbase.floatingactionbutton.FloatingActionButton。

Answer 3

Declare your activity in manifest file as follows

<activity
        android:name=".CreateNote"
        android:label="@string/app_name">
    </activity>

Answer 4

Ok, you got it working, but for your information, the reason why you were facing this problem was, the FAB is NOT one of those simple buttons that you create. You have to create an object of floatingActionButton instead of creating the object of button (which you did in your case).