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2014.02.03
Android アプリ サンプル 基本

短縮ダイヤルアプリ | AndroidBasic卒業生作成アプリ

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  • 登録画面
    • EntryActivity.java
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      package com.example.speeddialing;
       
      import android.app.Activity;
      import android.content.ContentValues;
      import android.content.Intent;
      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 EntryActivity extends Activity implements OnClickListener {
       
          private MyOpenHelper helper = new MyOpenHelper(this);
          private SQLiteDatabase db;
       
          @Override
          protected void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              setContentView(R.layout.activity_entry);
       
              Button button = (Button) findViewById(R.id.button1);
              button.setOnClickListener(this);
          }
       
          @Override
          public void onClick(View v) {
              db = helper.getWritableDatabase();
       
              EditText editName = (EditText) findViewById(R.id.editName);
              EditText editNumber = (EditText) findViewById(R.id.editNumber);
       
              String name = editName.getText().toString();
              String number = editNumber.getText().toString();
       
              if (editName.equals("")) {
                  Toast.makeText(this, "名前を入力してください。", Toast.LENGTH_SHORT).show();
              } else if (editNumber.equals("")) {
                  Toast.makeText(this, "番号を入力してください。", Toast.LENGTH_SHORT).show();
              } else {
                  ContentValues values = new ContentValues();
                  values.put(Table.NAME, name);
                  values.put(Table.NUMBER, number);
                  db.insert(Table.TABLE_NAME, Table.NAME, values);
       
                  editName.getEditableText().clear();
                  editNumber.getEditableText().clear();
       
                  Toast.makeText(this, "登録しました。", Toast.LENGTH_SHORT).show();
       
                  Intent intent = new Intent(EntryActivity.this, MainActivity.class);
                  startActivity(intent);
              }
          }
       
      }
    • activity_entry.xml
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      <?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/editName"
              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/editNumber"
              android:layout_width="match_parent"
              android:layout_height="wrap_content" />
       
          <Button
              android:id="@+id/button1"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:text="登録" />
       
      </LinearLayout>
  • 項目の詳細画面
    • RevisionActivity.java
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      package com.example.speeddialing;
       
      import android.app.Activity;
      import android.content.ContentValues;
      import android.content.Intent;
      import android.database.Cursor;
      import android.database.sqlite.SQLiteDatabase;
      import android.net.Uri;
      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 RevisionActivity extends Activity implements OnClickListener {
       
          private MyOpenHelper helper = new MyOpenHelper(this);
          private SQLiteDatabase db;
          private Cursor c;
       
          private EditText editName2;
          private EditText editNumber2;
          private Long id;
       
          @Override
          protected void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              setContentView(R.layout.activity_revision);
       
              db = helper.getReadableDatabase();
       
              Intent intent = getIntent();
              id = intent.getLongExtra("id", 1);
       
              c = db.query(Table.TABLE_NAME,
                      new String[] { Table.NAME, Table.NUMBER }, "_id = ?",
                      new String[] { String.valueOf(id) }, null, null, null);
       
              c.moveToFirst();
       
              editName2 = (EditText) findViewById(R.id.editName2);
              editNumber2 = (EditText) findViewById(R.id.editNumber2);
       
              editName2.setText(c.getString(c.getColumnIndex(Table.NAME)));
              editNumber2.setText(c.getString(c.getColumnIndex(Table.NUMBER)));
       
              Button button2 = (Button) findViewById(R.id.button2);
              Button button3 = (Button) findViewById(R.id.button3);
              Button button4 = (Button) findViewById(R.id.button4);
       
              button2.setOnClickListener(this);
              button3.setOnClickListener(this);
              button4.setOnClickListener(this);
          }
       
          @Override
          public void onClick(View v) {
       
              db = helper.getWritableDatabase();
       
              switch (v.getId()) {
              case R.id.button2:
                  ContentValues values = new ContentValues();
                  values.put(Table.NAME, editName2.getText().toString());
                  values.put(Table.NUMBER, editNumber2.getText().toString());
                  db.update(Table.TABLE_NAME, values, "_id = ?",
                          new String[] { String.valueOf(id) });
       
                  Toast.makeText(this, "上書きしました。", Toast.LENGTH_SHORT).show();
       
                  editName2.getEditableText().clear();
                  editNumber2.getEditableText().clear();
       
                  Intent intent = new Intent(RevisionActivity.this,
                          MainActivity.class);
                  startActivity(intent);
                  break;
       
              case R.id.button3:
                  db.delete(Table.TABLE_NAME, "_id = ?",
                          new String[] { String.valueOf(id) });
                  Toast.makeText(RevisionActivity.this, "削除しました。", Toast.LENGTH_SHORT)
                          .show();
                  Intent intent2 = new Intent(RevisionActivity.this,
                          MainActivity.class);
                  startActivity(intent2);
                  break;
       
              case R.id.button4:
                  Uri uri = Uri.parse("tel:"
                          + c.getString(c.getColumnIndex(Table.NUMBER)));
                  Intent intent3 = new Intent(Intent.ACTION_CALL, uri);
                  startActivity(intent3);
                  break;
       
              default:
                  break;
              }
       
          }
       
      }
    • activity_revision.xml
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      <?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" >
       
          <LinearLayout
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              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" />
          </LinearLayout>
       
          <LinearLayout
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:orientation="horizontal" >
       
              <Button
                  android:id="@+id/button2"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content"
                  android:layout_weight="1"
                  android:text="修正" />
       
              <Button
                  android:id="@+id/button3"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content"
                  android:layout_weight="1"
                  android:text="削除" />
          </LinearLayout>
       
          <LinearLayout
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:orientation="vertical" >
       
              <Button
                  android:id="@+id/button4"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content"
                  android:text="電話" />
          </LinearLayout>
       
      </LinearLayout>
  • スプラッシュ画面
    • SplashActivity.java
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      package com.example.speeddialing;
       
      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);
                  }
              }, 5000);
       
          }
      }
    • activity_splash
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      <?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:layout_width="match_parent"
              android:layout_height="match_parent"
              android:src="@drawable/splash" />
       
      </LinearLayout>
  • 「データベース」の生成ファイル
    • MyOpenHelper.java
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      package com.example.speeddialing;
       
      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, Table.DB, null, 1);
          }
       
          @Override
          public void onCreate(SQLiteDatabase db) {
              db.execSQL("create table " + Table.TABLE_NAME + "(" + Table.ID
                      + " integer primary key, " + Table.NAME + " text not null, "
                      + Table.NUMBER + " text not null );");
          }
       
          @Override
          public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
       
          }
       
      }
  • Table.java
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    package com.example.speeddialing;
     
    public class Table {
     
        public static final String DB = "DB";
        public static final String TABLE_NAME = "person";
     
        public static final String ID = "_id";
        public static final String NAME = "name";
        public static final String NUMBER = "number";
     
    }

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