명시적 인텐트 (explicit intent)

명시적 인텐트 (explicit intent)

명시적 인텐트 (explicit intent)

1. 메인 액티비티 레이아웃

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.progdv.explicit_intent.MainActivity">

    <EditText
        android:id="@+id/et"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:hint="Write your name down!" />
    
    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Submit"
        android:layout_toRightOf="@+id/et"
        />

</RelativeLayout>

2. 인텐트를 이용하여 실행시킬 액티비티 생성

3. 서브 액티비티의 레이아웃 xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.progdv.explicit_intent.SubActivity"
    android:background="#000"
    >

    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:textColor="#ffffff"
        android:textSize="10pt"
        />


</RelativeLayout>

4. 메인 액티비티 클래스

package com.progdv.explicit_intent;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

    EditText et;
    Button btn;
    String input;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        et = (EditText)findViewById(R.id.et);
        btn = (Button)findViewById(R.id.btn);

        btn.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                input = et.getText().toString();

                Intent intent =
                new Intent(MainActivity.this, SubActivity.class);
                intent.putExtra("key", input);
                startActivity(intent);
            }
        });



    }
}

5. 서브 액티비티 클래스

package com.progdv.explicit_intent;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;

public class SubActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sub);

        Intent intent = getIntent();
        String str = intent.getExtras().getString("key");

        TextView tv = (TextView)findViewById(R.id.tv);
        tv.setText(str);


    }
}