【移动应用开发技术】Android 中怎么实现Activity 间传递参数

【移动应用开发技术】Android中怎么实现Activity间传递参数

这篇文章将为大家详细讲解有关Android中怎么实现Activity间传递参数，文章内容质量较高，因此在下分享给大家做个参考，希望大家阅读完这篇文章后对相关知识有一定的了解。1.传递简单数据在AActivity中findViewById(R.id.startBActicityBtn).setOnClickListener(new

View.OnClickListener()

{

@Override

public

void

onClick(View

v)

{

Intent

i

=

new

Intent(MainActivity.this,TheActivity.class);

//

对基础的数据类型进行传递

i.putExtra("data","我是国人");

startActivity(i);

}

});在BActivity中接受数据

tv

=(TextView)findViewById(R.id.TheTextView);

Intent

i

=

getIntent();

tv.setText(i.getStringExtra("data"));这种传值就是传递基本的数据类型2.传递数据包Bundle在AActivity中

findViewById(R.id.startBActicityBtn).setOnClickListener(new

View.OnClickListener()

{

@Override

public

void

onClick(View

v)

{

Intent

i

=

new

Intent(MainActivity.this,TheActivity.class);

Bundle

bundle

=

new

Bundle();

bundle.putString("name","qll");

bundle.putInt("age",3);

//

i.putExtras(bundle);

//

另种传递方式

i.putExtra("data",bundle);

startActivity(i);

}

});

}在BActivity中接受数据

tv

=(TextView)findViewById(R.id.TheTextView);

editText

=

(EditText)

findViewById(R.id.editText3);

Intent

i

=

getIntent();

//

Bundle

date

=

i.getExtras();

//

接受方式不同

Bundle

date

=

i.getBundleExtra("data");

tv.setText(String.format("name=%s,age=%d",date.getString("name"),date.getInt("age")));这总传递方式类似iOS中传递字典数据类型过来。3.传递值对象自定义一个User类，传递自定义类需要对类进行序列化用Serializable进行序列化这种方法只需要类实现Serializable接口就可以了User类import

java.io.Serializable;

public

class

User

implements

Serializable{

private

String

name;

private

int

age;

public

int

getAge(){

return

age;

}

public

void

setAge(int

age){

this.age

=

age;

}

public

String

getName(){

return

name;

}

public

void

setName(String

name){

=

name;

}

public

User(String

name,int

age){

=

name;

this.age

=

age;

}在AActivity中

findViewById(R.id.startBActicityBtn).setOnClickListener(new

View.OnClickListener()

{

@Override

public

void

onClick(View

v)

{

Intent

i

=

new

Intent(MainActivity.this,TheActivity.class);

i.putExtra("user",new

User("qll",24));

startActivity(i);

}

});

}在BActivity中

tv

=(TextView)findViewById(R.id.TheTextView);

User

user

=

(User)i.getSerializableExtra("user");

tv.setText(String.format("user

info(name=%s,age=%d)",user.getName(),user.getAge()));用Parcelable实现同样的需要实现Parcelable接口User类package

com.example.wyhaiapple.transferdata1;

import

android.os.Parcel;

import

android.os.Parcelable;

import

android.text.ParcelableSpan;

public

class

User

implements

Parcelable{

private

String

name;

private

int

age;

public

int

getAge(){

return

age;

}

public

void

setAge(int

age){

this.age

=

age;

}

public

String

getName(){

return

name;

}

public

void

setName(String

name){

=

name;

}

public

User(String

name,int

age){

=

name;

this.age

=

age;

}

@Override

public

int

describeContents()

{

return

0;

}

@Override

public

void

writeToParcel(Parcel

dest,

int

flags)

{

dest.writeString(getName());

dest.writeInt(getAge());

}

public

static

final

Creator<User>

CREATOR

=

new

Creator<User>()

{

@Override

public

User

createFromParcel(Parcel

source)

{

return

new

User(source.readString(),source.readInt());

}

@Override

public

User[]

newArray(int

size)

{

return

new

User[size];

}

};

}在AActivity中与上面的相同在BActivity中

tv

=(TextView)findViewById(R.id.TheTextView);

User

user

=

(User)i.getParcelableExtra("user");

tv.setText(String.format("user

info(name=%s,age=%d)",user.getName(),user.getAge()));4.获取Activity的返回参数在BActivity中protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_the);

tv

=(TextView)findViewById(R.id.TheTextView);

editText

=

(EditText)

findViewById(R.id.editText3);

findViewById(R.id.button2).setOnClickListener(new

View.OnClickListener()

{

@Override

public

void

onClick(View

v)

{

Intent

i

=

new

Intent();

i.putExtra("data",editText.getText().toString());

setResult(1,i);

finish();

}

});

}

}在AActivity中startActivityForResult(i,0);

@Override

protected

void

onActivityResult(int

requestCode,

int

resultC