android期末考大题（沈阳师范大学）

1.SQLite数据库

public class MySqliteDB extends SQLiteOpenHelper { public MySqliteDB(Context context, String name, CursorFactory factory,int version) { super(context, name, factory, version);} public void onCreate(SQLiteDatabase db) { db.execSQL(\(\\

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

public class MainActivity extends Activity { Button btn;MySqliteDB mydb;

protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mydb=new MySqliteDB(this, \btn=(Button)findViewById(R.id.btn);

btn.setOnClickListener(new OnClickListener() { public void onClick(View v) {

SQLiteDatabase db=mydb.getReadableDatabase();}});} public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true;}}

2.添加ToggleButton

public class Example_55 extends Activity{ public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.main); ToggleButton toggleButton = (ToggleButton) findViewById(R.id.toggleButton); toggleButton.setChecked(true);

android:orientation=\android:layout_width=\android:layout_height=\

3.Spinner下拉列表框

public class Example_58 extends Activity{

public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.main);

Spinner spinner= (Spinner) findViewById(R.id.spinner);

ArrayAdapter aAdapter=ArrayAdapter.createFromResource(this, R.array.color,t,android.R.layout.simple_spinner_item); Adapter.setDropdownViewResource

(android.R.layout.simple_spinner_dropdown_item); spinner.setAdapter(aAdapter);

OnItemSelectedListener=new OnItemSelectedListener（）{

public void onItemSelected(AdapterView parent, View view, int position, long id){

Toast.makeText(Example_59.this,\选择的色彩：\parent.getItemAtPosition(position).toString(), Toast.LENGTH_LONG).show;}

public void onNothingSelected(AdapterView parent){ Toast.makeText(Example_59.this,\Toast.LENGTH_LONG).show;}};

Spinner.SrtOnItemSelectedListener(itemSelectedListener);}} 4.爱好

浙江

android:layout_width=\android:layout_height=\android:orientation=\

android:layout_width=\android:layout_height=\android:orientation=\

android:layout_width=\android:layout_height=\android:text=\用户名\

android:layout_width=\

android:layout_height=\

android:layout_width=\android:layout_height=\android:orientation=\

android:layout_width=\android:layout_height=\

android:text=\性别\

android:layout_width=\android:layout_height=\android:orientation=\

android:id=\

android:layout_width=\android:layout_height=\android:text=\男\

android:layout_width=\android:layout_height=\android:orientation=\

android:layout_width=\android:layout_height=\android:text=\籍贯\

android:layout_width=\android:layout_height=\android:orientation=\

android:layout_width=\android:layout_height=\android:text=\爱好\

android:id=\

android:layout_width=\android:layout_height=\android:text=\足球\

android:id=\

android:layout_width=\android:layout_height=\android:text=\提交\ 5.Toast提示信息

class ButtonClick implements OnClickListener{ public void onClick(View v) {

switch (v.getId()) {case R.id.button1:

toast.makeText(MainActivity.this, \默认的Toast显示\Toast.LENGTH_LONG).show();break; case R.id.button2:

toast = Toast.makeText(getApplicationContext(), \自定义位置的Toast显示\

toast.setGravity(Gravity.CENTER, toast.getXOffset()/2, toast.getYOffset()/2); toast.show();break; case R.id.button3:

toast = Toast.makeText(getApplicationContext(), \只有图片的Toast显示\

ImageView img = new ImageView(MainActivity.this); img.setImageResource(R.drawable.ic_launcher); toast.setView(img);toast.show();break; case R.id.button4:

toast = Toast.makeText(getApplicationContext(), \有图有字的Toast\

LinearLayout layout = (LinearLayout)toast.getView(); ImageView img1 = new ImageView(getApplicationContext()); img1.setImageResource(R.drawable.ic_launcher); layout.addView(img1,0);toast.show();break; case R.id.button5:

LayoutInflater inflater=(LayoutInflater)getSystemService (Context.LAYOUT_INFLATER_SERVICE);

View view=inflater.inflate(R.layout.toast,null); Toast toast = new Toast(getApplicationContext());

ImageView image = (ImageView) view.findViewById(R.id.img); image.setImageResource(R.drawable.ic_launcher); toast.setView(view);toast.show(); break;default:break;}}}

android:orientation=\android:layout_width=\android:layout_height=\android:padding=\

android:background=\

本文来源：https://www.bwwdw.com/article/yvco.html