電話帳アプリ | AndroidBasic卒業生作成アプリ

• EditActivity.java

package com.example.contactlistsample;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentValues;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class EditActivity extends Activity implements OnClickListener {

	private MyOpenHelper helper = new MyOpenHelper(this);

	private EditText nameEdit2;
	private EditText numberEdit2;
	private EditText addressEdit2;

	private String tableName = "person";
	private SQLiteDatabase db;

	private Cursor c;
	private long id;

	private AlertDialog alertDialog;

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

		db = helper.getWritableDatabase();

		Intent intent = getIntent();
		id = intent.getLongExtra("id", 0l);

		c = db.query(tableName, new String[] { PersonTable.NAME,
				PersonTable.NUMBER, PersonTable.ADDRESS }, "_id = ?",
				new String[] { String.valueOf(id) }, null, null, null);

		nameEdit2 = (EditText) findViewById(R.id.editName2);
		numberEdit2 = (EditText) findViewById(R.id.editNumber2);
		addressEdit2 = (EditText) findViewById(R.id.editAddress2);

		c.moveToFirst();

		nameEdit2.setText(c.getString(c.getColumnIndex(PersonTable.NAME)));
		numberEdit2.setText(c.getString(c.getColumnIndex(PersonTable.NUMBER)));
		addressEdit2
				.setText(c.getString(c.getColumnIndex(PersonTable.ADDRESS)));

		Button editB2 = (Button) findViewById(R.id.editButton2);
		Button editB3 = (Button) findViewById(R.id.editButton3);
		editB2.setOnClickListener(this);
		editB3.setOnClickListener(this);

	}

	@Override
	public void onClick(View v) {

		switch (v.getId()) {
		case R.id.editButton2:
			String name2 = nameEdit2.getText().toString();
			String number2 = numberEdit2.getText().toString();
			String address2 = addressEdit2.getText().toString();

			if (name2.equals("")) {
				Toast.makeText(this, "名前を入力してください。", Toast.LENGTH_SHORT).show();
			} else if (number2.equals("")) {
				Toast.makeText(this, "電話番号を入力してください。", Toast.LENGTH_SHORT)
						.show();
			} else {
				ContentValues insert2 = new ContentValues();
				insert2.put("name", name2);
				insert2.put("number", number2);
				insert2.put("address", address2);
				db.update(tableName, insert2, "_id = ?",
						new String[] { String.valueOf(id) });
			}

			nameEdit2.getEditableText().clear();
			numberEdit2.getEditableText().clear();

			Intent backIntent = new Intent(EditActivity.this,
					MainActivity.class);
			startActivity(backIntent);
			break;

		case R.id.editButton3:
			Alert();

		default:
			break;
		}

	}

	public void Alert() {
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setTitle("注意");
		builder.setMessage("このデータを削除します。" + "n" + "よろしいですか？");
		builder.setPositiveButton("削除", new DialogInterface.OnClickListener() {

			@Override
			public void onClick(DialogInterface dialog, int which) {
				db.delete(tableName, "_id = ?",
						new String[] { String.valueOf(id) });

				Intent backIntent2 = new Intent(EditActivity.this,
						MainActivity.class);
				startActivity(backIntent2);
			}
		});
		builder.setNegativeButton("キャンセル",
				new DialogInterface.OnClickListener() {

					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.dismiss();
					}
				});
		builder.setCancelable(true);
		alertDialog = builder.create();
		alertDialog.show();
	}
}

• activity_edit.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="名前" />

    <EditText
        android:id="@+id/editName2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="textPersonName" >

        <requestFocus />
    </EditText>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="電話番号" />

    <EditText
        android:id="@+id/editNumber2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="phone" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="メールアドレス" />

    <EditText
        android:id="@+id/editAddress2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="textEmailAddress" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/editButton2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="上書き" />

        <Button
            android:id="@+id/editButton3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="削除" />
    </LinearLayout>

</LinearLayout>

• SplashActivity.java

package com.example.contactlistsample;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.Window;

public class SplashActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);

		setContentView(R.layout.activity_splash);

		Handler handler = new Handler();
		handler.postDelayed(new Runnable() {

			@Override
			public void run() {
				Intent intent = new Intent(SplashActivity.this,
						MainActivity.class);
				startActivity(intent);
			}
		}, 1500);
	}

}

• activity_splash

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imageView1"
        android:src="@drawable/splash"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

• MyOpenHelper.java

package com.example.contactlistsample;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class MyOpenHelper extends SQLiteOpenHelper {

	public MyOpenHelper(Context context) {
		super(context, "NameAgeDB", null, 1);
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		db.execSQL("create table person(" + " _id INTEGER PRIMARY KEY, "
				+ PersonTable.NAME + " text not null," + PersonTable.NUMBER
				+ " text not null," + PersonTable.ADDRESS + " text " + ");");
	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

	}

}

class PersonTable {
	public static final String NAME = "name";
	public static final String NUMBER = "number";
	public static final String ADDRESS = "address";
}

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