在Android中,实现数据传递的方法有很多种。
下列使用java语言的特性,通过Serializable接口将数据序列化,再将其传递出去。
1.实体类:
Content.java:
import java.io.Serializable;
//利用Java语言本身的特性,通过将数据序列化后,再将其传递出去。
//实体类
public class Content implements Serializable {
private int number;
private String name;
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
2.设置数据参数:
MainActivity.java:
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import java.io.FileOutputStream;
public class MainActivity extends AppCompatActivity {
private EditText ed1,ed2;
private Button quary;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
quary = this.findViewById(R.id.quary);
ed1 = this.findViewById(R.id.ed1);
ed2 = this.findViewById(R.id.ed2);
quary.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Content content = new Content();
String name = ed1.getText().toString();
content.setName(name);
int number = Integer.parseInt(ed2.getEditableText().toString());
content.setNumber(number);
Intent intent = new Intent(MainActivity.this,MainActivity2.class);
intent.putExtra("serializable",content);
startActivity(intent);
}
});
}
}
对应的布局文件:
activity_main.xml:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/ed1"
android:hint="姓名:"
/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/ed2"
android:inputType="number"
android:layout_below="@+id/ed1"
android:hint="年龄:"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/quary"
android:layout_below="@+id/ed2"
android:text="查看"/>
</RelativeLayout>
3.接收参数
MainActivity2.java:
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.io.FileInputStream;
public class MainActivity2 extends AppCompatActivity {
private TextView xinxi;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
xinxi = this.findViewById(R.id.tv);
Content content = (Content) getIntent().getSerializableExtra("serializable");
String result = "姓名"+content.getName()+"\n"+"年龄:"+content.getNumber();
xinxi.setText(result);
}
}
对应的布局文件:
activity_main2.xml:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="100dp"
android:textColor="@color/black"
android:textSize="20sp"
android:id="@+id/tv" />
</RelativeLayout>
实现效果:
输入数据:
点击“查看”:
简单粗暴!
感谢ლ(°◕‵ƹ′◕ლ)!!!