自定义AlertDialog

如何修改AlertDialog的标题和标题下面的分割线的颜色

1.反射 

	public static void colorAlertDialog1(Context context, AlertDialog dialog) {
		try {
			int dividerId = dialog.getContext().getResources().getIdentifier("android:id/titleDivider", null, null);
			if (dividerId != 0) {
				View divider = dialog.findViewById(dividerId);
				divider.setBackgroundColor(context.getResources().getColor(R.color.text_grey));
				LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, 2);
				lp.setMargins(20, 0, 20, 0);
				divider.setLayoutParams(lp);
			}

			int textViewId = dialog.getContext().getResources().getIdentifier("android:id/alertTitle", null, null);
			if (textViewId != 0) {
				TextView tv = (TextView) dialog.findViewById(textViewId);
				tv.setTextColor(context.getResources().getColor(R.color.red));
			}
			 
		} catch (Exception e) {
			return;
		}

	}

该方法的问题：对于国内深度定制的rom。。。该方法无效。而且，如果没有trycatch的话，还会导致异常。

2.继承AlertDialogBuilder

public class CustomAlertDialogBuilder extends AlertDialog.Builder {
	/** The custom_body layout */
	private View mDialogView;
	private AlertDialog mDialog;

	/** optional dialog title layout */
	private TextView mTitle;
	/** optional alert dialog image */
	private ImageView mIcon;
	/** optional message displayed below title if title exists */
	private TextView mMessage;
	/**
	 * method
	 */
	/** optional custom panel image */
	private FrameLayout mCustom;
	/** Keep Context as Member to support Apis below 11 */
	private Context mContext;

	public CustomAlertDialogBuilder(Context context, int theme) {
		super(context, theme);

		mDialogView = View.inflate(context, R.layout.dialog_custom_layout, null);
		super.setView(mDialogView);

		mTitle = (TextView) mDialogView.findViewById(R.id.alertTitle);
		mMessage = (TextView) mDialogView.findViewById(R.id.message);
		mIcon = (ImageView) mDialogView.findViewById(R.id.icon);
		mCustom = (FrameLayout) mDialogView.findViewById(R.id.customPanel);
		mContext = context;
	}

	/**
	 * Use this method to reference the whole dialog view, i.e. when inflating a
	 * custom view with {@link #setCustomView(int, Context)} and you want to
	 * find an id from the inflated layout.
	 * 
	 * example:
	 * 
	 * CheckBox showAgain = (CheckBox)
	 * myQustomDialogBuilder.getDialogView().findViewById
	 * (R.id.inflated_checkbox); if (!showAgain.isChecked()) { // do something }
	 * 
	 * @return the qustom dialog view
	 */
	public View getDialogView() {
		return mDialogView;
	}

	@Override
	public CustomAlertDialogBuilder setTitle(CharSequence text) {
		mDialogView.findViewById(R.id.topPanel).setVisibility(View.VISIBLE);
		mTitle.setText(text);
		return this;
	}

	@Override
	public CustomAlertDialogBuilder setTitle(int textResId) {
		mDialogView.findViewById(R.id.topPanel).setVisibility(View.VISIBLE);
		mTitle.setText(textResId);
		return this;
	}

	@Override
	public CustomAlertDialogBuilder setMessage(int textResId) {
		mDialogView.findViewById(R.id.contentPanel).setVisibility(View.VISIBLE);
		mMessage.setText(textResId);
		return this;
	}

	@Override
	public CustomAlertDialogBuilder setMessage(CharSequence text) {
		mDialogView.findViewById(R.id.contentPanel).setVisibility(View.VISIBLE);
		mMessage.setText(text);
		return this;
	}

	@Override
	public CustomAlertDialogBuilder setIcon(int drawableResId) {
		mIcon.setVisibility(View.VISIBLE);
		mIcon.setImageResource(drawableResId);
		return this;
	}

	@Override
	public CustomAlertDialogBuilder setIcon(Drawable icon) {
		mIcon.setImageDrawable(icon);
		return this;
	}

	/**
	 * This allows you to specify a custom layout for the area below the title
	 * divider bar in the dialog. As an example you can look at
	 * example_ip_address_layout.xml and how I added it in
	 * TestDialogActivity.java
	 * 
	 * @param resId
	 *            of the layout you would like to add
	 * @param context
	 */
	@Override
	public CustomAlertDialogBuilder setView(View view) {
		mCustom.setVisibility(View.VISIBLE);
		mCustom.addView(view);
		return this;
	}

	@Override
	public Builder setSingleChoiceItems(ListAdapter adapter, int checkedItem, final DialogInterface.OnClickListener listener) {
		final ListView listView = (ListView) mDialogView.findViewById(R.id.listView);
		listView.setAdapter(adapter);
		listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
		listView.setItemChecked(checkedItem, true);

		if (listener != null) {
			listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
				@Override
				public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
					listener.onClick(CustomAlertDialogBuilder.this.mDialog, position);
				}
			});
		}

		return this;
	}

	@Override
	public Builder setSingleChoiceItems(CharSequence[] items, int checkedItem, final DialogInterface.OnClickListener listener) {
		ArrayAdapter<CharSequence> adapter = new ArrayAdapter<CharSequence>(mContext, android.R.layout.simple_list_item_single_choice, android.R.id.text1,
				items);

		return this.setSingleChoiceItems(adapter, checkedItem, listener);
	}

	@Override
	public Builder setSingleChoiceItems(int itemsId, int checkedItem, final DialogInterface.OnClickListener listener) {
		return this.setSingleChoiceItems(mContext.getResources().getTextArray(itemsId), checkedItem, listener);
	}

}

这样，使用时

AlertDialog dialog = new CustomAlertDialogBuilder(mActivity, R.style.theDialog).setTitle(R.string.tips).setMessage(title)
				.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
					public void onClick(DialogInterface dialog, int whichButton) {
						finishAnim();
					}
				}).create();
		dialog.setCancelable(false);
		dialog.show();

效果棒棒哒。

如何修改AlertDialog按钮的背景色和字体颜色 

自定义style

  <style name="theDialog" parent="@android:style/Theme.Holo.Light.Dialog">
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:backgroundDimEnabled">true</item>
        <item name="android:windowFrame">@null</item>
        <item name="android:borderlessButtonStyle">@style/alertdialogbtn</item>
        <item name="android:windowIsFloating">true</item>
        <item name="android:windowIsTranslucent">false</item>
        <item name="android:backgroundDimAmount">0.5</item>
    </style>

关键一行是

<item name="android:borderlessButtonStyle">@style/alertdialogbtn</item>

  <style name="alertdialogbtn" parent="@android:style/Widget.Holo.Button.Borderless">
        <item name="android:background">@drawable/btn_bg_dialog</item>
        <item name="android:textColor">@color/text</item>
    </style>

效果 ：