android - 在 alertdialog 中添加 TextView 边距/填充

Question

我正在尝试在 alertdialog 中为我的 TextView 添加边距。

AlertDialog.Builder builder = new AlertDialog.Builder(getContext()); 
builder.setTitle(notificationList.get(position).getNotificationTitle());
final TextView tv = new TextView(getContext());
tv.setInputType( InputType.TYPE_CLASS_NUMBER );   
tv.setText(notificationList.get(position).getNotificationMessage());
builder.setView(tv);

我正在尝试将我的脚本更改为此

AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
                builder.setTitle(notificationList.get(position).getNotificationTitle());
                LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
                params.setMargins(10,10,10,10);
                final TextView tv = new TextView(getContext());
                tv.setLayoutParams(params);
                tv.setInputType( InputType.TYPE_CLASS_NUMBER );
                tv.setText(notificationList.get(position).getNotificationMessage());
                builder.setView(tv);

但仍然没有帮助，那么我如何为我的 textview 添加边距？

Answer 1

试试这个。当您添加 textView 时，您不需要 tv.setInputType(InputType.TYPE_CLASS_NUMBER);

    AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
    builder.setTitle((notificationList.get(position).getNotificationTitle());
    final TextView tv = new TextView(mContext);
    FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
    layoutParams.height = 100;
    layoutParams.width = FrameLayout.MarginLayoutParams.MATCH_PARENT;
    layoutParams.setMargins(50, 20, 50, 10);
    tv.setText(notificationList.get(position).getNotificationMessage());
    tv.setGravity(Gravity.CENTER);
    builder.setView(tv);
    builder.create().show();
    tv.setLayoutParams(layoutParams);

您可以根据需要在 layoutParams.setMargins(int left, int top, int right, int bottom) 中更改边距。mContext 是您在其中使用警报对话框的 Activity 的上下文。因此，请确保该 Activity 应具有主题 Theme.AppCompat。或者您可以更改应用的样式。

例如:

public class MainActivity extends AppCompatActivity {

    private Context mContext;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mContext = this;
    }
}

现在您可以使用 mContext 作为当前 Activity 或 Activity 中后续 fragment 的上下文。