Android中使用Intent傳遞對象

Intent 也可以傳遞對象的，例子如下：
 
MyParcelable.java 檔案:
Java代碼 
package com.ldq.parcelable; 
 
import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
 
public class MyParcelable extends Activity { 
 
    private Button button; 
 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
 
        button = (Button) findViewById(R.id.button1); 
 
        button.setOnClickListener(new OnClickListener() { 
 
            @Override 
            public void onClick(View v) { 
                // TODO Auto-generated method stub 
 
                Student student = new Student(); 
                student._id = 1001; 
                student.name = "zhang"; 
                student.sex = 1; 
                student.age = 10; 
 
                Intent intent = new Intent(MyParcelable.this, 
                        AnotherActivity.class); 
                intent.putExtra("student", student); 
                startActivity(intent); 
 
            } 
        }); 
    } 
} 
 
Student.java 檔案:
Java代碼 
package com.ldq.parcelable; 
 
import android.os.Parcel; 
import android.os.Parcelable; 
 
public class Student implements Parcelable { 
    public int _id; 
    public String name; 
    public int sex; 
    public int age; 
 
    Student(Parcel p) { 
        _id = p.readInt(); 
        name = p.readString(); 
        sex = p.readInt(); 
        age = p.readInt(); 
    } 
 
    Student() { 
    }; 
 
    public static final Parcelable.Creator<Student> CREATOR = new Parcelable.Creator<Student>() { 
        public Student createFromParcel(Parcel p) { 
            return new Student(p); 
        } 
 
        public Student[] newArray(int size) { 
            return new Student[size]; 
        } 
    }; 
 
    public int describeContents() { 
        return 0; 
    } 
 
    public void writeToParcel(Parcel p, int flags) { 
        p.writeInt(_id); 
        p.writeString(name); 
        p.writeInt(sex); 
        p.writeInt(age); 
 
    } 
} 
 
AnotherActivity.java 檔案:
Java代碼 
package com.ldq.parcelable; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.widget.TextView; 
 
public class AnotherActivity extends Activity { 
 
    private TextView textView; 
 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main1); 
 
        Student s = getIntent().getParcelableExtra("student"); 
        textView = (TextView) findViewById(R.id.textView1); 
        textView.setText("name:" + s.name + ",age:" + s.age); 
 
    } 
} 
 
AndroidManifest.xml 檔案:
Xml代碼 
<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.ldq.parcelable" android:versionCode="1" 
    android:versionName="1.0"> 
    <uses-sdk android:minSdkVersion="8" /> 
 
    <application android:icon="@drawable/icon" android:label="@string/app_name"> 
        <activity android:name=".MyParcelable" android:label="@string/app_name"> 
            <intent-filter> 
                <action android:name="android.intent.action.MAIN" /> 
                <category android:name="android.intent.category.LAUNCHER" /> 
            </intent-filter> 
        </activity> 
        <activity android:name=".AnotherActivity"> 
        </activity> 
 
    </application> 
</manifest> 
 
main.xml 檔案:
Xml代碼 
<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" android:layout_width="fill_parent" 
    android:layout_height="fill_parent"> 
    <Button android:text="Button" android:id="@+id/button1" 
        android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> 
</LinearLayout> 
 main1.xml 檔案:
Xml代碼 
<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" android:layout_width="fill_parent" 
    android:layout_height="fill_parent"> 
    <TextView android:text="TextView" android:id="@+id/textView1" 
        android:layout_width="wrap_content" android:layout_height="wrap_content"></TextView> 
</LinearLayout> 

 

作者“leidiqiu”