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Android 开发中使用Intent传递数据的方法
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Activity之間通過Intent傳遞值，支持基本數據類型和String對象及它們的數組對象byte、byte[]、char、char[]、boolean、boolean[]、short、short[]、int、int[]、long、long[]、float、float[]、double、double[]、String、String[]，還有采用實現Serializable、Parcelable接口的類對象傳遞數據的兩種方法：一種是Bundle.putSerializable(Key,Object);另一種是Bundle.putParcelable(Key, Object)
例如：
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import?android.os.Parcel;????import?android.os.Parcelable;????public?class?Book?implements?Parcelable?{????????private?String?bookName;????????private?String?author;????????private?int?publishTime;????????????????public?String?getBookName()?{????????????return?bookName;????????}????????public?void?setBookName(String?bookName)?{????????????this.bookName?=?bookName;????????}????????public?String?getAuthor()?{????????????return?author;????????}????????public?void?setAuthor(String?author)?{????????????this.author?=?author;????????}????????public?int?getPublishTime()?{????????????return?publishTime;????????}????????public?void?setPublishTime(int?publishTime)?{????????????this.publishTime?=?publishTime;????????}????????????????public?static?final?Parcelable.Creator<Book>?CREATOR?=?new?Creator<Book>()?{????????????public?Book?createFromParcel(Parcel?source)?{????????????????Book?mBook?=?new?Book();????????????????mBook.bookName?=?source.readString();????????????????mBook.author?=?source.readString();????????????????mBook.publishTime?=?source.readInt();????????????????return?mBook;????????????}????????????public?Book[]?newArray(int?size)?{????????????????return?new?Book[size];????????????}????????};????????????????public?int?describeContents()?{????????????return?0;????????}????????public?void?writeToParcel(Parcel?parcel,?int?flags)?{????????????parcel.writeString(bookName);????????????parcel.writeString(author);????????????parcel.writeInt(publishTime);????????}????}??? 實現Serializable接口：
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import?java.io.Serializable;????public?class?Person?implements?Serializable?{????????private?static?final?long?serialVersionUID?=?-7060210544600464481L;?????????private?String?name;????????private?int?age;????????public?String?getName()?{????????????return?name;????????}????????public?void?setName(String?name)?{????????????this.name?=?name;????????}????????public?int?getAge()?{????????????return?age;????????}????????public?void?setAge(int?age)?{????????????this.age?=?age;????????}????????????}??? ?
這樣在Activity中就可編寫傳遞數據代碼：
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Intent?mIntent?=?new?Intent(this,?地址Activity.class);????Bundle?mBundle?=?new?Bundle();????mBundle.putParcelable("data",?mBook);????mBundle.putSerializable("data",?items);??mIntent.putExtras(mBundle);????????????startActivity(mIntent);?? 接受數據可以采用：
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Intent?intent?=?getIntent();??ArrayList<Map<String,?String>>?items?=?(ArrayList<Map<String,?String>>)intent.getExtras().get("data"); ?
轉載于:https://www.cnblogs.com/duanweishi/p/4263434.html
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