更新时间:2021-08-27 22:56:39
转载前请标明出处:http://blog.csdn.net/sahadev_
先上一下示例图:
这是默认状态下:这是通过反射后修改的结果:
在解决这个问题之前首先需要了解一下AlertDialog的基本构造,所以先从源码看起:
想要知道为什么显示不全,首先入口处应该是这里:
builder.setTitle("关于印发《省环境监察局关于开展党的群众路线教育实践活动的实施方案》的通知");然后进入setTitle的方法:
/** * Set the title displayed in the {@link Dialog}. * * @return This Builder object to allow for chaining of calls to set methods */ public Builder setTitle(CharSequence title) { P.mTitle = title; return this; }
public static class Builder { private final AlertController.AlertParams P; private int mTheme; /** * Constructor using a context for this builder and the {@link AlertDialog} it creates. */ public Builder(Context context) { this(context, resolveDialogTheme(context, 0)); }
好了,进入AlertController.AlertParams类内可以看到该类是属于AlertController的内部类,以下为该类的部分属性:
public static class AlertParams { public final Context mContext; public final LayoutInflater mInflater; public int mIconId = 0; public Drawable mIcon; public int mIconAttrId = 0; public CharSequence mTitle;
在内类可以看到该方法使用了该属性:
public void apply(AlertController dialog) { if (mCustomTitleView != null) { dialog.setCustomTitle(mCustomTitleView); } else { if (mTitle != null) { dialog.setTitle(mTitle); }
通过寻找找到apply该方法的被调用处是:
/** * Creates a {@link AlertDialog} with the arguments supplied to this builder. It does not * {@link Dialog#show()} the dialog. This allows the user to do any extra processing * before displaying the dialog. Use {@link #show()} if you don't have any other processing * to do and want this to be created and displayed. */ public AlertDialog create() { final AlertDialog dialog = new AlertDialog(P.mContext, mTheme, false); P.apply(dialog.mAlert); dialog.setCancelable(P.mCancelable); if (P.mCancelable) { dialog.setCanceledOnTouchOutside(true); } dialog.setOnCancelListener(P.mOnCancelListener); dialog.setOnDismissListener(P.mOnDismissListener); if (P.mOnKeyListener != null) { dialog.setOnKeyListener(P.mOnKeyListener); } return dialog; }
AlertDialog dialog = builder.create(); try { Class<?> mAlert = dialog.getClass(); Log.e("sahadev", mAlert.getName()); Field field = mAlert.getDeclaredField("mAlert"); field.setAccessible(true); Log.e("sahadev", field.getName() + "----" + field.get(dialog)); Field mTitleView = field.get(dialog).getClass().getDeclaredField("mTitleView"); mTitleView.setAccessible(true); Object AlertController = field.get(dialog); mTitleView.set(AlertController, new TextView(this));//该方法<span style="font-family:Microsoft YaHei;">没起作用,不知道为什么,有大神清楚么?</span> dialog.show(); Object obj = mTitleView.get(AlertController); TextView textView = (TextView) obj; textView.setSingleLine(false); } catch (Exception e) { e.printStackTrace(); }好了,到了这里就解决完毕了。
如有问题请留言。