Question

我在我的Android应用程序中使用了progressDialog，我使用了代码

ProgressDialog progressDialog = new ProgressDialog(this);
        progressDialog.setCancelable(false);
        progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        progressDialog.setMessage("Please wait to get contacts");
        progressDialog.setProgress(0);

        progressDialog.show();

我想更改邮件字体大小，并希望在邮件中添加一些颜色吗？

Answer 1

以编程方式更改Android中的ProgressDialog消息字体大小：

String s= "Hello";
String title="MyTitle";

SpannableString ss1=  new SpannableString(title);
ss1.setSpan(new RelativeSizeSpan(2f), 0, ss1.length(), 0);  
ss1.setSpan(new ForegroundColorSpan(Color.RED), 0, ss1.length(), 0); 
SpannableString ss2=  new SpannableString(s);
ss2.setSpan(new RelativeSizeSpan(2f), 0, ss2.length(), 0);  
ss2.setSpan(new ForegroundColorSpan(Color.GREEN), 0, ss2.length(), 0); 

ProgressDialog pd = new ProgressDialog(this);
pd.setTitle(ss1);
pd.setMessage(ss2);
pd.show();

Answer 2

private ProgressDialog Dialog = new ProgressDialog(currentfile.this);

Dialog.setMessage(Html.fromHtml("<font color='white'  ><big>"
                    + "Downloading ..." + "</big></font>"));

Dialog.show();

Answer 3

制作如下所示的自定义进度对话框：

custom_progress_dialog.xml

<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:gravity="center"
  android:background="@null"
>
  <TextView
    android:id="@+id/animation"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/string"
    android:size="30dp"  />
</LinearLayout>

MyCustomProgressDialog.java

public class MyCustomProgressDialog extends ProgressDialog {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.custom_progress_dialog);

      ...
    }
    public static MyCustomProgressDialog ctor(Context context) {
        MyCustomProgressDialog dialog = new MyCustomProgressDialog(context);
        dialog.setIndeterminate(true);
        dialog.setCancelable(false);
        return dialog;
    }


     @Override
     public void show() {
        super.show();
    }

    @Override
    public void dismiss() {
      super.dismiss();
     }


}

然后在asynctask中使用进度对话框类，如下所示：

class DemoAsyncTask extends AsyncTask<Void, Void, Void> {
  private final MyCustomProgressDialog progressDialog;

  public DemoAsyncTask(Context ctx) {
    progressDialog = MyCustomProgressDialog.ctor(ctx);
  }

  @Override
  protected void onPreExecute() {
    super.onPreExecute();
    textView.setVisibility(View.INVISIBLE);

    progressDialog.show();
  }

如何在android中以编程方式更改ProgressDialog Message字体大小？

3 个答案: