電話帳アプリ | AndroidBasic卒業生作成アプリ

この記事は2014年1月31日に書かれたものです。内容が古い可能性がありますのでご注意ください。


  • 編集画面
    • 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>
      
  • スプラッシュ画面
    • 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>
      
  • 「データベース」の生成ファイル
    • 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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