android activity之间传递bitmap

activity之间有个很好的传递数据的工具–>Intent。

传递基本数据类型

如果是八大基本数据类型，可以直接传递:

Intent intent ＝ new Intent(activityA,activityB);intent.putExtra("key1",111);startActivity(intent);

在activityB中接收

Intent intent = getIntent();int value1 = intent.getInt("key1",1);

传递可序列化对象

序列化Student类

public class Student implements Serializable{    private String username;    private int age;    public void setUsername(String username){        this.username = username;    }    public String getUsername(){        return this.username;    }    public void setAge(){        this.age = age;    }    public int getAge(){        return this.age;    }}

activityA中发送数据

Student student = new Student();student.setUsername("大飞");student.setAge(18);Intent intent = new Intent();Bundle bundle = new Bundle();bundle.putSerializable("student",student);intent.putExtras(bundle);startActivity(activityA,activityB); 

在activityB中接收数据

Student student = (Student)getIntent.getExtras("student");

传递bitmap

思路：将bitmap对象转换为字节数组传递
activityA发送数据:

Intent intent = new Intent(activityA,activityB);ByteArrayOutputStream baos = new ByteArrayOutputStream();//下面方法表示压缩图片，中间的值越小，压缩比例越大，失真也约厉害，100表示不压缩bitmap.compress(Bitmap.CompressFormat.PNG,100,baos);byte[] byteArray = baos.toByteArray();intent.putExtra("photoByte",byteArray);startActivity(intent);

activityB接收数据

byte[] byteArray = getIntent().getByteArrayExtra("photoByte");Bitmap bitmap = BitmapFactory.decodeByteArray(byteArray,0,byteArray.length);