安卓应用程序在getString()代码行崩溃

if (context != null) {
    String text = context.getString(R.string.some_string);
}

<!-- strings.xml -->
<string name="some_string">Some Text</string>

int resourceId = R.string.some_string;
String text = context.getString(resourceId);

new Thread(new Runnable() {
    @Override
    public void run() {
        if (context != null) {
            final String text = context.getString(R.string.some_string);
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    textView.setText(text);
                }
            });
        }
    }
}).start();

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        TextView textView = findViewById(R.id.textView);
        String text = getString(R.string.some_string);
        textView.setText(text);
    }
}