在Android Studio中使用广播生成随机字符

public class RandomCharReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        // 生成随机字符
        String randomChar = generateRandomChar();
        
        // 更新文本视图
        TextView textView = ((Activity) context).findViewById(R.id.textView);
        textView.setText(randomChar);
    }
    
    private String generateRandomChar() {
        // 生成随机字符的逻辑代码
        // ...
    }
}

<receiver
    android:name=".RandomCharReceiver"
    android:enabled="true"
    android:exported="false">
    <intent-filter>
        <action android:name="com.example.randomchar.ACTION_GENERATE_RANDOM_CHAR" />
    </intent-filter>
</receiver>

Button button = findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        // 发送广播
        Intent intent = new Intent("com.example.randomchar.ACTION_GENERATE_RANDOM_CHAR");
        sendBroadcast(intent);
    }
});