public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private ProgressDialog pd2 = null;

    private final static int MAXVALUE = 100;
    private int progressStart = 0;
    private int add = 0;

    @SuppressLint("HandlerLeak")
    final Handler hand = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            if (msg.what == 0x114514) {
                //设置进度条的当前值
                pd2.setProgress(progressStart);
            }
            if (progressStart >= MAXVALUE) {
                pd2.dismiss();
            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        findViewById(R.id.btn1).setOnClickListener(this);
        findViewById(R.id.btn2).setOnClickListener(this);
        findViewById(R.id.btn3).setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn1:
                ProgressDialog.show(MainActivity.this, "Loading", "少女祈祷中...", false, true);
                break;
            case R.id.btn2:
                ProgressDialog pd1 = new ProgressDialog(MainActivity.this);
                // 依次设置标题,内容
                pd1.setTitle("Loading");
                pd1.setMessage("思考好玩的加载提示中...");
                pd1.setCancelable(true);
                // 这里是设置进度条的风格, HORIZONTAL 是水平进度条, SPINNER 是圆形进度条
                pd1.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                pd1.setIndeterminate(true);
                // 调用 show() 方法将ProgressDialog显示出来
                pd1.show();
                break;
            case R.id.btn3:
                progressStart = 0;
                add = 0;
                pd2 = new ProgressDialog(MainActivity.this);
                pd2.setMax(MAXVALUE);
                pd2.setTitle("Loading");
                pd2.setMessage("正在挽救纱世里...");
                pd2.setCancelable(false);
                pd2.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                // 取消不确定性进度
                pd2.setIndeterminate(false);
                pd2.show();
                // 新建一个线程更新进度
                new Thread() {
                    public void run() {
                        while (progressStart < MAXVALUE) {
                            progressStart = 2 * takeTime();
                            hand.sendEmptyMessage(0x114514);
                        }
                    }
                }.start();
                break;
        }
    }

    private int takeTime() {
        add++;
        try {
            Thread.sleep(100);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return add;
    }
}