[移动开发]Android Studio:电子书 JAVA实现

public class MainActivity extends AppCompatActivity {
private Button bt;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    bt = findViewById(R.id.button);

    bt.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent(MainActivity.this,mulu.class);
            startActivity(intent);
        }
        2.
        public class mulu extends AppCompatActivity {

private Button bt1; private Button bt8; String mulu[] = {“第一回 甄士隐梦幻识通灵　贾雨村风尘怀闺秀”,“第二回 贾夫人仙逝扬州城　冷子兴演说荣国府”,“第三回 贾雨村夤缘复旧职　林黛玉抛父进京都”,“第四回 薄命女偏逢薄命郎　葫芦僧乱判葫芦案”,“第五回 游幻境指迷十二钗　饮仙醪曲演红楼梦”}; private ListView listView; ArrayAdapter adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_mulu); bt1=findViewById(R.id.button7); listView = findViewById(R.id.lv); bt1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(mulu.this,MainActivity.class); startActivity(intent); } }); adapter = new ArrayAdapter(mulu.this,android.R.layout.simple_list_item_1,mulu); listView.setAdapter(adapter); listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { String result = adapterView.getItemAtPosition(i).toString(); Toast.makeText(mulu.this,“您点击了”+result,Toast.LENGTH_SHORT).show(); if(i==0){ Intent intent = new Intent(mulu.this,neirong.class); startActivity(intent); } }
3.
ublic class neirong extends AppCompatActivity {
private Button bt2;
private Button bt3;
private TextView tx;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_neirong);
bt2 = findViewById(R.id.button2);
bt3 = findViewById(R.id.button3);
tx = findViewById(R.id.diyizhang);
try {
InputStream is = getAssets().open(“hlm1.txt”);
int len = is.available();
byte[] buffer = new byte[len];
is.read(buffer);
String result = new String(buffer,“utf-8”);
tx.setText(result);
} catch (IOException e) {
e.printStackTrace();
}

    bt2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent(neirong.this,mulu.class);
            startActivity(intent);
        }
    });
    bt3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent(neirong.this,mulu.class);
            startActivity(intent);
        }
    });
}