【Android开发】移动程序设计期末复习练习题（一）

public class MainActivity extends AppCompatActivity {

??? @Override

??? protected void onCreate(Bundle savedInstanceState) {

??????? super.onCreate(savedInstanceState);

??????? setContentView(R.layout.activity_main);

? ??????//获取id为button1的按钮控件

??????? Button button1 =_____（1-1）_______(R.id.button1);

??????? button1.setOnClickListener(new View.OnClickListener() {

??????????? @Override

????? ??????public void onClick(View v) {

??????????????? Intent intent = new Intent();

? ??????????????//隐式调用SecondActivity

??????????????? intent.setAction("_________（1-2）_________");?

? ??????????????//启动SecondActivity，第2个参数为请求码

??????????????? _______（1-3）____________(intent, 2);?

??????????? }

??????? } );

? ??????//获取id为button2的按钮控件

??????? Button button2=findViewById(_____（1-4）_________);

??????? button2.setOnClickListener(new View.OnClickListener() {

?????????? ?@Override

??????????? public void onClick(View v) {

??????????????? Intent intent = new Intent();

?????????????? //显示调用ThirdActivity

??????????????? intent.setClass(MainActivity.this, _____（1-5）_________);?

?????????????? //设置Bundle类型数据

??????????????? Bundle bundle = new Bundle();?

??????????????? bundle.putString("name", "张三");

??????????????? bundle.___ （1-6）____("age", 20);

?????????????? //通过意图对象携带数据

??????????????? intent.putExtra("data", bundle);?

?????????????? //启动ThirdActivity并请求数据回传，第2个参数为请求码

??????????????? startActivityForResult(intent, 3);?

??????????? }

??????? } );

??? }

??? @Override

??? protected void onActivityResult(int requestCode, int resultCode, Intent data) {

??????? super.onActivityResult( requestCode, resultCode, data);

?????? //判断是哪个Activity返回的数据，使用结果码

??????? if(resultCode==3) {

?????????? //获取返回的数据

??????????? String string = data.getStringExtra("hello");

??????? }

??? }

}

<activity

android:name=".SecondActivity"

android:label="隐式调用SecondActivity">

<intent-filter>

<action android:name="android.intent.action.ysdy" />

<category android:name="android.intent.category.DEFAULT" />

</intent-filter>

</activity>

public class SecondActivity extends AppCompatActivity {

??? @Override

??? protected void onCreate(Bundle savedInstanceState) {

?? ?????super.onCreate(savedInstanceState);

??????? setContentView(R.layout.activity_second);

}

public class ThirdActivity extends AppCompatActivity {

??? @Override

??? protected void onCreate(Bundle savedInstanceState) {

??????? super.onCreate(savedInstanceState);

??????? setContentView(R.layout.activity_third);

??????? String receiver="接收的数据如下: \n";

??????? Intent intent=getIntent();

??????? Bundle data= intent.getBundleExtra("data");? //获取捆绑数据

?? ?????receiver+="name: "+data.getString("name")+"\n";

??????? receiver+="age: "+data.getInt("age");

??????? //在屏幕上显示接收到的数据

??????? Toast.makeText(this, receiver, Toast.LENGTH_LONG).show();

??????? //通过意图对象携带返回数据

??????? intent=new Intent();

??????? intent.___ （1-7）______("hello","How are you?");?

??????? //设置返回数据和结果码

??????? _____（1-8）_______(3,intent);?

??? }

}

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

private TextView textView;

??? private Button query_contacts;

??? @Override

??? protected void onCreate(Bundle savedInstanceState) {

??????? super.onCreate(savedInstanceState);

??????? setContentView(R.layout.activity_main);

??????? query_contacts = findViewById(R.id.query_contacts);

??????? query_contacts.setOnClickListener(this);

??????? textView = findViewById(R.id.tv);

??? }

??? @Override

??? public void onClick(View v) {

??????? //动态申请读取手机通讯录权限

??????? ActivityCompat.___ （2-1）______(MainActivity.this, new String[]{"android.permission.READ_CONTACTS"}, 1);

}

??? @Override

??? public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {

????? ??super.onRequestPermissionsResult(requestCode, permissions, grantResults);

??????? if (requestCode == 1) {

??????????? for (int i = 0; i < permissions.length; i++) {

??????????????? if (permissions[i].equals("android.permission.READ_CONTACTS")
??????? && grantResults[i] == PackageManager.___ （2-2）______) {

??????????????? ????Toast.makeText(MainActivity.this,"已获取权限", Toast.LENGTH_SHORT).show();

??????????????????? fetchContactInformation();

??????????????? }else{

??????????????????? finish();

??????????????? }

??????????? }

??????? }

}

//读取手机联系人信息的方法

??? public void fetchContactInformation() {

??????? String id,name,phoneNumber;

? ??//定义一个字符串变量，用于保存查询结果

??????? String contacts = "";

? ??//获取内容解析器对象，用于对内容提供者的数据进行操作

??????? ContentResolver contentResolver = this.___ （2-3）______;

? ??????//首先查询手机联系人表获取联系人的id和姓名

??????? Cursor cursor = contentResolver.query(ContactsContract.Contacts.CONTENT_URI,

??????????????? null, null, null, null);

??????? while(cursor.moveToNext()) {

??????????? //获取联系人id

??????????? id = cursor.getString(cursor.getColumnIndex(___ （2-4）______));

??????????? //获取联系人姓名

??????????? name = cursor.getString(cursor.getColumnIndex(___ （2-5）______));

??????????? contacts+= "姓名："+name+"\n";

??????????? //然后查询手机联系人数据表获取联系人的电话号码

??????????? //根据id查询相应联系人的电话

??????????? Cursor phoneCursor = contentResolver.query(

?????? ?????????????ContactsContract.CommonDataKinds.Phone.CONTENT_URI,

??????????????????? null, ___ （2-6）______ + "=" + id, null, null);

??????????? contacts+= "电话：";

??????????? while(phoneCursor.moveToNext()) {

????? ??????????phoneNumber = phoneCursor.getString(

phoneCursor.getColumnIndex(___ （2-7）______));

??????????????? contacts+= phoneNumber +"???????? ";

??????????? }

??????????? contacts+="\n\n";

??????????? phoneCursor.close();

??????? }

??? ????//在界面上显示所查询到的所有手机联系人信息

??????? textView.setText(contacts);

????? ??cursor.close();

??? }

}

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