实现的效果如下所示
其实这也只是一个DialogFragment 而已，重点只是在于界面的设计
想要使用做出这样一个DialogFragment ，需要自定义一个View，然后将该View传入到该Dialog中
先定义布局，一个TextView用于标题，一个TextView用于升级内容阐述，一个ImageView，一个确认升级的按钮
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/tv_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:gravity="center"
android:textColor="#0474dc"
android:textSize="22sp"
android:textStyle="bold" />
<TextView
android:id="@+id/tv_description"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:gravity="center"
android:textColor="#0474dc"
android:textSize="18sp" />
<ImageView
android:layout_width="70dp"
android:layout_height="70dp"
android:layout_gravity="center"
android:layout_marginBottom="20dp"
android:layout_marginTop="20dp"
android:src="@drawable/upgrade" />
<Button
android:id="@+id/btn_upgrade"
style="@style/blueButtonStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="20dp"
android:layout_marginEnd="20dp"
android:layout_marginStart="20dp"
android:gravity="center"
android:text="立即更新" />
</LinearLayout>
当中，按钮需要用到自定义Style
<!--用于按钮的蓝色背景风格-->
<style name="blueButtonStyle" parent="Widget.AppCompat.Button.Borderless">
<item name="android:background">@drawable/button_blue_background</item>
<item name="android:textAppearance">@style/blueButtonTextStyle</item>
</style>
<!--用于蓝色风格按钮的文本风格-->
<style name="blueButtonTextStyle">
<item name="android:textColor">@android:color/white</item>
<item name="android:textSize">17sp</item>
</style>
建立 DialogFragment 的子类
/**
* 作者： 叶应是叶
* 时间： 2017/3/23 12:36
* 描述：
*/
public class VersionDialogFragment extends DialogFragment {
private static final String TITLE = "title";
private static final String DESCRIPTION = "description";
private View.OnClickListener positiveCallback;
private String title;
private String description;
public static VersionDialogFragment getInstance(String title, String description) {
Bundle bundle = new Bundle();
bundle.putString(TITLE, title);
bundle.putString(DESCRIPTION, description);
VersionDialogFragment versionDialogFragment = new VersionDialogFragment();
versionDialogFragment.setArguments(bundle);
return versionDialogFragment;
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle bundle = getArguments();
title = bundle.getString(TITLE);
description = bundle.getString(DESCRIPTION);
}
public void show(FragmentManager fragmentManager, View.OnClickListener positiveCallback) {
this.positiveCallback = positiveCallback;
show(fragmentManager, "VersionDialogFragment");
}
@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
final View view = inflater.inflate(R.layout.version_dialog, null);
TextView tv_title = (TextView) view.findViewById(R.id.tv_title);
TextView tv_description = (TextView) view.findViewById(R.id.tv_description);
Button btn_upgrade = (Button) view.findViewById(R.id.btn_upgrade);
tv_title.setText(title);
tv_description.setText(description);
btn_upgrade.setOnClickListener(positiveCallback);
builder.setView(view);
return builder.create();
}
}
然后再到 MainActivity 中调用Dialog
public void showDialog(View view) {
final VersionDialogFragment dialogFragment = VersionDialogFragment.getInstance("2.0.1新版本发布啦", "更多功能等你体验");
dialogFragment.show(getSupportFragmentManager(), new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "进行更新操作吧", Toast.LENGTH_SHORT).show();
dialogFragment.dismiss();
}
});
}
此时界面是这样的
可以看到 Dialog 中有较大的空白区，显得有点虚浮
这里可以选择在 VersionDialogFragment 的 onStart() 方法中指定 Dialog 所占屏幕宽度的比例
@Override
public void onStart() {
super.onStart();
Dialog dialog = getDialog();
if (dialog != null) {
DisplayMetrics dm = new DisplayMetrics();
getActivity().getWindowManager().getDefaultDisplay().getMetrics(dm);
if (dialog.getWindow() != null) {
dialog.getWindow().setLayout((int) (dm.widthPixels * 0.7), ViewGroup.LayoutParams.WRAP_CONTENT);
}
}
}
这里设置占据屏幕宽度的百分之七十
效果图如下所示
此时 Dialog 的四个角还都是直的，这里再来将之修改为圆角
在drawable文件夹下新建一个root.xml文件，作为Dialog使用到的布局的根Layout的背景
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners android:radius="20dp" />
<solid android:color="#ffffff" />
</shape>
@Override
public void onStart() {
super.onStart();
Dialog dialog = getDialog();
if (dialog != null) {
DisplayMetrics dm = new DisplayMetrics();
getActivity().getWindowManager().getDefaultDisplay().getMetrics(dm);
if (dialog.getWindow() != null) {
dialog.getWindow().setLayout((int) (dm.widthPixels * 0.8), ViewGroup.LayoutParams.WRAP_CONTENT);
}
}
}
然后再修改onStart()方法，为Dialog的Window设置透明背景色
@Override
public void onStart() {
super.onStart();
Dialog dialog = getDialog();
if (dialog != null) {
DisplayMetrics dm = new DisplayMetrics();
getActivity().getWindowManager().getDefaultDisplay().getMetrics(dm);
if (dialog.getWindow() != null) {
dialog.getWindow().setLayout((int) (dm.widthPixels * 0.7), ViewGroup.LayoutParams.WRAP_CONTENT);
dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);
}
}
}
这样，总的效果就都完成了
