自定义dialog简单封装
安卓的dialog有很多种，什么AlertDialog、ProgressDialog、TimePickerDialog等等。虽然谷歌似乎帮我们做了很多封装，但实际应用时却感觉很不好用，比如我不想要title。下面我们就来仿照AlertDialog对我们自定义的dialog进行封装。没有封装的简单自定义点这，封装的好处我就不多说了。首先先看效果图。
其次我们把代码直接贴出来!
public class DialogBuilder {
private Context context;
private int themeResId;
private View layout;
private boolean cancelable = true;
private CharSequence title, message, cancelText, sureText;//除了message的所有文本，不写则Gone。
private View.OnClickListener sureClickListener, cancelClickListener;
public DialogBuilder(Context context) {
this(context, R.style.CustomDialog);
}
public DialogBuilder(Context context, int themeResId) {
this(context, themeResId, ((LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.custom_dialog_layout, null));
}
//自定义layout用这个
public DialogBuilder(Context context, int themeResId, View layout) {
this.context = context;
this.themeResId = themeResId;
this.layout = layout;
}
//能否返回键取消
public DialogBuilder setCancelable(Boolean cancelable) {
this.cancelable = cancelable;
return this;
}
public DialogBuilder title(CharSequence title) {
this.title = title;
return this;
}
public DialogBuilder message(CharSequence message) {
this.message = message;
return this;
}
public DialogBuilder cancelText(CharSequence str) {
this.cancelText = str;
return this;
}
//确定按钮文本
public DialogBuilder sureText(CharSequence str) {
this.sureText = str;
return this;
}
public DialogBuilder setSureOnClickListener(View.OnClickListener listener) {
this.sureClickListener = listener;
return this;
}
public DialogBuilder setCancelOnClickListener(View.OnClickListener listener) {
this.cancelClickListener = listener;
return this;
}
public Dialog build() {
final Dialog dialog = new Dialog(context, themeResId);
dialog.setCancelable(cancelable);
dialog.addContentView(layout, new ActionBar.LayoutParams(
ActionBar.LayoutParams.MATCH_PARENT, ActionBar.LayoutParams.WRAP_CONTENT));
//设置显不显示
setText(title, R.id.title);
setText(message, R.id.message);
setText(cancelText, R.id.cancel);
setText(sureText, R.id.sure);
if (isValid(cancelText) || isValid(sureText)) {
layout.findViewById(R.id.line2).setVisibility(View.VISIBLE);
}
if (isValid(cancelText) && isValid(sureText)) {
layout.findViewById(R.id.line).setVisibility(View.VISIBLE);
}
//没有title时message变大
if(!isValid(title)){
((TextView)layout.findViewById(R.id.message)).setTextSize(TypedValue.COMPLEX_UNIT_DIP,16);
}
//一行居中
final TextView textView = (TextView)layout.findViewById(R.id.message);
textView.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
@Override
public boolean onPreDraw() {
if(textView.getLineCount() ==1){
textView.setGravity(Gravity.CENTER);
}
return true;
}
});
//设置点击监听
if (sureClickListener != null) {
layout.findViewById(R.id.sure).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
sureClickListener.onClick(view);
dialog.dismiss();
}
});
}
if (cancelClickListener != null) {
layout.findViewById(R.id.cancel).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
cancelClickListener.onClick(view);
dialog.dismiss();
}
});
}
//设置宽度
WindowManager.LayoutParams params = dialog.getWindow().getAttributes();
params.width = (int) (context.getResources().getDisplayMetrics().widthPixels * 0.80);
dialog.getWindow().setAttributes(params);
return dialog;
}
private void setText(CharSequence text, int id) {
if (isValid(text)) {
TextView textView = (TextView) layout.findViewById(id);
textView.setText(text);
textView.setVisibility(View.VISIBLE);
}
}
private boolean isValid(CharSequence text) {
return text != null && !"".equals(text.toString().trim());
}
}
下面是custom_dialog_layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:orientation="vertical">
<TextView
android:id="@+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:ellipsize="end"
android:gravity="center"
android:maxLines="2"
android:textColor="#38ADFF"
android:textSize="16dp"
android:visibility="gone" />
<TextView
android:id="@+id/message"
android:padding="16dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="left"
android:lineSpacingMultiplier="1.2"
android:text="正文"
android:textSize="14dp" />
<View
android:id="@+id/line2"
android:layout_width="fill_parent"
android:layout_height="0.5dp"
android:background="#cccccc"
android:visibility="gone" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/cancel"
android:layout_width="0dp"
android:layout_height="44dp"
android:layout_weight="1.0"
android:gravity="center"
android:textColor="#666666"
android:textSize="14dp"
android:visibility="gone" />
<View
android:id="@+id/line"
android:layout_width="0.5dp"
android:layout_height="match_parent"
android:background="#cccccc"
android:visibility="gone" />
<TextView
android:id="@+id/sure"
android:layout_width="0dp"
android:layout_height="44dp"
android:layout_weight="1.0"
android:gravity="center"
android:textColor="#38ADFF"
android:textSize="14dp"
android:visibility="gone" />
LinearLayout>
style样式CustomDialog
<style name="CustomDialog" parent="android:style/Theme.Dialog">
- "android:windowBackground"
>@android:color/transparent
- "android:windowNoTitle">true
- "android:windowFrame">@null
- "android:windowIsFloating">true
- "android:backgroundDimEnabled">true
style>
主activity调用
new DialogBuilder(MainActivity.this)
.title("有标题的")
.message("当两行时左对齐。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。")
.sureText("我知道了")
.setCancelable(false)
.setSureOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new DialogBuilder(MainActivity.this)
.title("有标题的")
.message("显示确定和取消两个")
.cancelText("确定")
.sureText("取消")
.setSureOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new DialogBuilder(MainActivity.this)
.title("有标题的")
.message("当只有一行时居中")
.build().show();
}
}).build().show();
}
}).build().show();
好了 ，就四部分代码。拷过去就能用了