Android學習-ProgressBar、SeekBar

seekbar手動拖動與progressbar進度綁定

• 佈局代碼
  
  

  
  
  

   <ProgressBar
       android:id="@+id/progress2"
       style="@style/Widget.AppCompat.ProgressBar.Horizontal"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:padding="20dp"
       android:progress="30" />
  
   <SeekBar
       android:id="@+id/seekbar"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:padding="10dp"/>
  
   <TextView
       android:id="@+id/tv_Progress"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:text="當前的進度是"
       android:textSize="18dp"/>
  

`

• 活動代碼

public class Test extends AppCompatActivity {
   
   
    private ProgressBar progressBar;
    private SeekBar seekBar;
    private TextView tvprogress;
    protected void onCreate(Bundle savedInstanceState) {
   
   
        super.onCreate(savedInstanceState);
        setContentView(R.layout.test);
        initView();

    }
    public void initView(){
   
   
        progressBar = findViewById(R.id.progress2);
        seekBar = findViewById(R.id.seekbar);
        tvprogress = findViewById(R.id.tv_Progress);

        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
   
   
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
   
   
                //滑桿值發生改變，此方法被觸發。1.本身，2.進度欄
                progressBar.setProgress(progress);//滑桿走多少，進度條走多少
                tvprogress.setText("當前進度爲" + progress + "%");
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
   
   
                //有touch行爲時會觸發
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
   
   
                //拖動停止時會觸發
                if(progressBar.getProgress() >= progressBar.getMax()){
   
   
                    progressBar.setVisibility(View.INVISIBLE);
                }else{
   
   
                    progressBar.setVisibility(View.VISIBLE);
                }
            }
        });
    }

}

很簡單，不知道有用沒。。。