AlertDialog的标题居中，底部按钮为三个时居中布局，更改按钮文字默认大写的设置

更改底部按钮默认大写的设置

<style name="CustomAlertDialog" parent="@style/Theme.AppCompat.Light.Dialog.Alert"> <item name="buttonBarButtonStyle">@style/CustomAlertDialogButton</item> </style> <style name="CustomAlertDialogButton" parent="Widget.AppCompat.Button.ButtonBar.AlertDialog"> <item name="textAllCaps">false</item> <!--关闭默认大写的设置 --> </style> //最后通过构造函数将样式传进去 AlertDialog.Builder builder = new AlertDialog.Builder(getActivity(), R.style.CustomAlertDialog);

底部按钮为三个时，三个按钮居中

//默认情况下： AlertDialog.Builder builder = new AlertDialog.Builder(this, R.style.CustomAlertDialog); AlertDialog dialog = builder.setTitle("My Title") .setMessage("My Message") .setPositiveButton("Positive", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { showToast("Positive"); } }).setNeutralButton("Neutral", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { showToast("Neutral"); } }).setNegativeButton("Negative", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { showToast("Negative"); } }).create(); dialog.show();

可以看到底部的三个按钮不是居中的。Negative按钮偏右。可以做如下调整：

AlertDialog.Builder builder = new AlertDialog.Builder(this, R.style.CustomAlertDialog); AlertDialog dialog = builder.setTitle("My Title") .setMessage("My Message") .setPositiveButton("Positive", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { showToast("Positive"); } }).setNeutralButton("Neutral", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { showToast("Neutral"); } }).setNegativeButton("Negative", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { showToast("Negative"); } }).create(); dialog.show(); //一定要在dialog.show()之后才能执行下面的代码 Button mNegativeButton = dialog.getButton(AlertDialog.BUTTON_NEGATIVE); Button mPositiveButton = dialog.getButton(AlertDialog.BUTTON_POSITIVE); Button mNeutralButton = dialog.getButton(AlertDialog.BUTTON_NEUTRAL); LinearLayout.LayoutParams positiveButtonLL = (LinearLayout.LayoutParams) mPositiveButton.getLayoutParams(); positiveButtonLL.weight = 1; mPositiveButton.setLayoutParams(positiveButtonLL); LinearLayout.LayoutParams mNegativeButtonLL = (LinearLayout.LayoutParams) mNegativeButton.getLayoutParams(); mNegativeButtonLL.weight = 1; mNegativeButton.setLayoutParams(mNegativeButtonLL); LinearLayout.LayoutParams mNeutralButtonLL = (LinearLayout.LayoutParams) mNeutralButton.getLayoutParams(); mNeutralButtonLL.weight = 1; mNeutralButton.setLayoutParams(mNeutralButtonLL);

标题居中

TextView title = new TextView(this); title.setText("My Custom Title"); title.setPadding(0, 25, 0, 0); title.setGravity(Gravity.CENTER); title.setTextSize(18); title.setTextColor(Color.BLACK); AlertDialog.Builder builder = new AlertDialog.Builder(this, R.style.CustomAlertDialog); AlertDialog dialog = builder.setCustomTitle(title) //其它同上