Android期末考试复习资料.docx

Android期末考试复习资料1.登录跳转 Button btn; EditText name; EditText password; OnClickListener lis; protected void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn=(Button)findViewById(R.id.button1); name=(EditText)findViewById(R.id.editText1); password=(EditText)findViewById(R.id.editText2); lis=new OnClickListener Override public void onClick(View arg0) / TODO Auto-generated method stub String namestr=name.getEditableText.toString; String pwdstr=password.getEditableText.toString; switch(arg0.getId) case R.id.button1: if(namestr.equals("lk")&&pwdstr.equals("123456") /startActivity(intent); /使用SharedPreferences保存数据 SharedPreferences sf=getPreferences(Activity.MODE_PRIVATE); Editor edit=sf.edit; edit.putString("name", namestr); edit.putString("password", pwdstr); mit;/提交当前数据 Intent intent =new Intent(MainActivity.this,SecondActivity.class); startActivity(intent); else /使用Toast信息提示框提示成功写入数据 Toast.makeText(MainActivity.this, "error", Toast.LENGTH_SHORT).show; break; ; btn.setOnClickListener(lis); 2.Menu菜单 public class MainActivity extends Activity TextView tv; private static final int ITEM1=Menu.FIRST; Override protected void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tv=(TextView)findViewById(R.id.tv); Override public boolean onCreateOptionsMenu(Menu menu) getMenuInflater.inflate(R.menu.main, menu); MenuItem begin=menu.getItem(0); OnMenuItemClickListener lis=new OnMenuItemClickListener Override public boolean onMenuItemClick(MenuItem item) / TODO Auto-generated method stub switch (item.getItemId) case R.id.begin: Intent intent=new Intent(MainActivity.this,SecondActivity.class); startActivity(intent); break; return false; ; begin.setOnMenuItemClickListener(lis); return true; 3.BroadcastReceiver广播 public class MainActivity extends Activity Button btn; OnClickListener lis; Override protected void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn=(Button)findViewById(R.id.button1); lis=new OnClickListener Override public void onClick(View v) / TODO Auto-generated method stub Intent intent=new Intent("nihao"); intent.putExtra("haha", "my"); intent.putExtra("hahaha", "mymy"); sendBroadcast(intent); ; btn.setOnClickListener(lis); 创建一个类MyReceiver继承BroadcastReceiver: public class MyReciever extends BroadcastReceiver Context context; public static int NOTIFICATION=21321; Override public void onReceive(Context context, Intent intent) / TODO Auto-generated method stub this.context=context; String haha=intent.getStringExtra("my"); String hahaha=intent.getStringExtra("mymy"); NotificationManager nm= (NotificationManager) context.getSystemService(android.content.Context.NOTIFICATION_SERVICE); Notification nf=new Notification(R.drawable.ic_launcher,haha,System.currentTimeMillis); PendingIntent pinent=PendingIntent.getActivity(context, 0, new Intent(context,BroadcastReceiver.class), 0); nf.setLatestEventInfo(context, hahaha, null, pinent); nm.notify(NOTIFICATION, nf); 4.打电话、发短信 MainActivity类 protected void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn=(Button)findViewById(R.id.call); btn2=(Button)findViewById(R.id.send); lis=new OnClickListener Override public void onClick(View arg0) / TODO Auto-generated method stub Intent intent; Uri uri; switch(arg0.getId) case R.id.call: uri = Uri.parse("tel:10086"); intent = new Intent(Intent.ACTION_CALL,uri); startActivity(intent); break; case R.id.send: uri = Uri.parse("smsto:10086"); intent = new Intent(Intent.ACTION_SENDTO,uri); startActivity(intent); break; ; btn.setOnClickListener(lis); btn2.setOnClickListener(lis); 5.AsyncTask异步类 public class MainActivity extends Activity ProgressBar pro; TextView tx; public class see extends AsyncTask<Integer, Integer, String> Override protected String doInBackground(Integer. params) / TODO Auto-generated method stub for(int i =0;i<=100;i+) pro.setProgress(i); publishProgress(i); try Thread.sleep(params0); catch (InterruptedException e) / TODO Auto-generated catch block e.printStackTrace; return "success" Override protected void onPostExecute(String result) / TODO Auto-generated method stub setTitle(result); super.onPostExecute(result); Override protected void onProgressUpdate(Integer. values) / TODO Auto-generated method stub super.onProgressUpdate(values); tx.setText(values0+" "); Button btn; OnClickListener lis; Override protected void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn=(Button)findViewById(R.id.button1); pro=(ProgressBar)findViewById(R.id.progressBar1); tx=(TextView)findViewById(R.id.textView1); lis=new OnClickListener Override public void onClick(View v) / TODO Auto-generated method stub see se=new see; se.execute(200); ; btn.setOnClickListener(lis); 6.Handler 先添加两张图片 MainActivity类 ImageView im; Handler handle=new Handler Override添加Source中方法 public void handleMessage(Message msg) / TODO Auto-generated method stub super.handleMessage(msg); switch(msg.what) case 0: im.setImageResource(R.drawable.aisi); break; case 1: im.setImageResource(R.drawable.lufei); break; super.handleMessage(msg); ; Override protected void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); im=(ImageView)findViewById(R.id.imageView1); MyThread t=new MyThread(this); t.start; MyThread类 public class MyThread extends Thread MainActivity main; int what=0; public MyThread(MainActivity mainActivity) / TODO Auto-generated constructor stub main=mainActivity; Override添加Override方法 public void run / TODO Auto-generated method stub while(true) main.handler.sendEmptyMessage(what+)%2); try Thread.sleep(3000); catch (InterruptedException e) / TODO Auto-generated catch block e.printStackTrace; 7.Music MainActivity类 Override protected void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); playbtn = (Button)findViewById(R.id.start); stopbtn = (Button)findViewById(R.id.stop); lis=new OnClickListener =new OnClickListener Intent intent; Override public void onClick(View v) / TODO Auto-generated method stub switch (v.getId) case R.id.playbtn: intent=new Intent(MainActivity.this,Music.class); startService(intent); break; case R.id.stopbtn: intent=new Intent(MainActivity.this,Music.class); stopService(intent); break; ; playbtn.setOnClickListener(lis); stopbtn.setOnClickListener(lis); Music类 public class Music extends Service MediaPlayer mp; Override public IBinder onBind(Intent arg0) / TODO Auto-generated method stub return null; 然后添加两个Override方法 Override public void onCreate / TODO Auto-generated method stub /super.onCreate; mp=MediaPlayer.create(this, R.raw.sound); mp.start; Override public void onDestroy / TODO Auto-generated method stub /super.onDestroy; mp.stop; 8.Notification Button btn; Button btn2; OnClickListener lis; OnClickListener lis2; Override protected void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn = (Button) findViewById(R.id.button1); btn2 = (Button) findViewById(R.id.button2); final NotificationManager nm=(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE); lis=new OnClickListener Override public void onClick(View v) / TODO Auto-generated method stub Notification nf=new Notification; nf.icon=R.drawable.ic_launcher; nf.tickerText="hello" Context context=getApplicationContext; CharSequence contentTitle="My Notification" CharSequence contentText="hello world" Intent intent=new Intent(MainActivity.this,SecondActivity.class); PendingIntent ci=PendingIntent.getActivity(context, 0, intent, 0); nf.setLatestEventInfo(context, contentTitle, contentText, ci); nm.notify(0, nf); ; btn.setOnClickListener(lis); btn2.setOnClickListener(new OnClickListener Override public void onClick(View v) / TODO Auto-generated method stub nm.cancelAll; ); 12.Color TextView tv; Button btn; Override protected void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tv=(TextView)findViewById(R.id.tv); btn=(Button)findViewById(R.id.button1); registerForContextMenu(tv); registerForContextMenu(btn); btn.setOnClickListener(new android.view.View.OnClickListener Override public void onClick(View v) / TODO Auto-generated method stub showDialog(1); ); Override Deprecated protected Dialog onCreateDialog(int id) / TODO Auto-generated method stub /return super.onCreateDialog(id); Dialog dialog=null; Builder b=new AlertDialog.Builder(this); switch(id) case 1: b.setTitle("alert"); b.setMessage("alert message"); b.setPositiveButton("ok",new OnClickListener Override public void onClick(DialogInterface dialog, int which) / TODO Auto-generated method stub ); break; return dialog; Override public boolean onCreateOptionsMenu(Menu menu) / Inflate the menu; this adds items to the action bar if it is present. getMenuInflater.inflate(R.menu.main, menu); return true; Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) / TODO Auto-generated method stub /super.onCreateContextMenu(menu, v, menuInfo); switch(v.getId) case R.id.tv: menu.add(0,0,0,"black"); menu.add(0,1,0,"red"); break; case R.id.button1: menu.add(0,2,0,"green"); Override public boolean onContextItemSelected(MenuItem item) super.onContextItemSelected(item); switch(item.getItemId) case 0: tv.setBackgroundColor(Color.BLACK); break; case 1: tv.setBackgroundColor(Color.RED); break; case 2: tv.setBackgroundColor(Color.GREEN); break; return true;