英文:
how to get context inside MainActivity.java
问题
以下是您要翻译的内容：
我正在尝试为React Native应用程序创建一个启动画面。
我已经成功了，但我必须为标题添加自定义字体。
以下是我用于实现它的代码，但显然它不起作用。
package com.hackerkid;
import android.os.Bundle;
import com.facebook.react.ReactActivity;
import org.devio.rn.splashscreen.SplashScreen;
import android.widget.TextView;
import android.graphics.Typeface;
import android.content.Context;
public class MainActivity extends ReactActivity {
/**
* 返回从JavaScript注册的主组件的名称。这用于安排组件的呈现。
*/
@Override
protected String getMainComponentName() {
return "hackerkid";
}
@Override
protected void onCreate(Bundle savedInstanceState) {
SplashScreen.show(this);
super.onCreate(savedInstanceState);
TextView splashText = (TextView) findViewById(R.id.splashTitle);
Typeface face = Typeface.createFromAsset(this.getAssets(), "fonts/FredokaOne-Regular.ttf");
splashText.setTypeface(face);
}
}
`getAssests()` 不起作用，我无法从中获取当前上下文的资产。
我是Android开发的新手。
我尝试过`getApplicationContext()`，但没有成功。
请指导我如何在MainActivity.java中获取上下文。
谢谢
请注意，这段代码中的注释已经翻译为中文，代码部分保持原样。
英文:
I am trying to do a splash screen for a React Native application.
I have succeeded but I have to add a custom font to the heading.
Below is my code for doing it, but clearly it is not working.
package com.hackerkid;
import android.os.Bundle;
import com.facebook.react.ReactActivity;
import org.devio.rn.splashscreen.SplashScreen;
import android.widget.TextView;
import android.graphics.Typeface;
import android.content.Context;
public class MainActivity extends ReactActivity {
/**
* Returns the name of the main component registered from JavaScript. This is used to schedule
* rendering of the component.
*/
@Override
protected String getMainComponentName() {
return "hackerkid";
}
@Override
protected void onCreate(Bundle savedInstanceState) {
SplashScreen.show(this);
super.onCreate(savedInstanceState);
TextView splashText = (TextView) findViewById(R.id.splashTitle);
Typeface face = Typeface.createFromAsset(this.getAssets(), "fonts/FredokaOne-Regular.ttf");
splashText.setTypeface(face);
}
}
getAssests() is not working, I am not able to get the current context to getAssests from it.
I am very new to android development.
I have tried getApplicationContext() but it did not work.
Kindly guide me how to get the context inside MainActivity.java
Thanks
答案1
得分: 0
ReactActivity类提供了getApplicationContext()，因此在MainActivity.java类中使用这个上下文。根据您的代码，请查看以下代码片段：
public class MainActivity extends ReactActivity {
@Override
protected String getMainComponentName() {
return "hackerkid";
}
@Override
protected void onCreate(Bundle savedInstanceState) {
SplashScreen.show(this);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView splashText = findViewById(R.id.splashTitle);
// 这个`getApplicationContext()`是从ReactActivity类中获取的。
Typeface face = Typeface.createFromAsset(getApplicationContext().getAssets(), "fonts/FredokaOne-Regular.ttf");
splashText.setTypeface(face);
}
}
英文:
ReactActivity class class provides you getApplicationContext(), so use this context inside MainActivity.java class.
Check the following code snippet as per your code:
public class MainActivity extends ReactActivity {
@Override
protected String getMainComponentName() {
return "hackerkid";
}
@Override
protected void onCreate(Bundle savedInstanceState) {
SplashScreen.show(this);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView splashText = findViewById(R.id.splashTitle);
// This getApplicationContext() is from ReactActivity class.
Typeface face = Typeface.createFromAsset(getApplicationContext().getAssets(), "fonts/FredokaOne-Regular.ttf");
splashText.setTypeface(face);
}
}
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