如何在安卓中逐行读取文件后在UI上显示SetText值？

<TextView
    android:id="@+id/textView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="16sp"
    android:textColor="#000000"
    android:scrollbars="vertical"
    android:maxLines="100"
    android:scrollbarStyle="insideOverlay"
    android:fadeScrollbars="false"
    android:scrollbarThumbVertical="@drawable/scrollbar_vertical_thumb"
    android:scrollbarTrackVertical="@drawable/scrollbar_vertical_track"
    />

try {
    FileInputStream fis = new FileInputStream("文件路径");
    BufferedReader reader = new BufferedReader(new InputStreamReader(fis));
    StringBuilder sb = new StringBuilder();
    String line;
    while ((line = reader.readLine()) != null) {
        sb.append(line).append("\n");
    }
    reader.close();
    fis.close();
    
    // 在UI上显示文件内容
    TextView textView = findViewById(R.id.textView);
    textView.setText(sb.toString());
} catch (IOException e) {
    e.printStackTrace();
}

String filePath = "android.resource://" + getPackageName() + "/" + R.raw.filename;