java - Android:我应该如何删除 Activity 标题栏？

Question

我想摆脱 Activity 标题栏，因为它很烦人。

我之前收到的所有帮助都不起作用:(。这是原始帖子。 Android: How to remove the Activity Title Bar?

这是代码和 xml 文件。

package com.example.ryanfolz.gridgame;

import android.content.Context;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.Button;


public class MainActivity extends ActionBarActivity {

private Context ctx;




@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    ctx = this;
    Button startButton = (Button) findViewById(R.id.start_button);
    startButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent gotoChooseGame = new Intent(ctx, WhichGameActivity.class);
            finish();
            startActivity(gotoChooseGame);

        }
    });
    Button optionsButton = (Button)findViewById(R.id.options_button);
    optionsButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent gotoChooseGame = new Intent(ctx, WhichGameActivity.class);
            finish();
            startActivity(gotoChooseGame);

        }
    });






}


@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_main, 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);
}


}


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:theme="@android:style/Theme.NoTitleBar"
android:background="#ff000000">

<Button
    android:layout_width="120dp"
    android:layout_height="65dp"
    android:id="@+id/start_button"
    android:padding="15dp"
    android:text="@string/play"
    android:textSize="18sp"
    android:background="#fffff6f9"/>

<Button
    android:layout_width="120dp"
    android:layout_height="65dp"
    android:text="@string/options"
    android:id="@+id/options_button"
    android:padding="15dp"
    android:layout_below="@+id/start_button"
    android:layout_alignLeft="@+id/start_button"
    android:layout_alignStart="@+id/start_button"
    android:background="#fffff6f9"
    android:layout_marginTop="44dp" />

感谢您的所有帮助。

Answer 1

您的声明特别要求操作栏

public class MainActivity extends ActionBarActivity {

尝试

public class MainActivity extends Activity {