import android.content.Context;import android.content.res.TypedArray;import android.graphics.Color;import android.support.annotation.AttrRes;import android.support.annotation.NonNull;import android.support.annotation.Nullable;import android.util.AttributeSet;import android.view.Gravity;import android.view.View;import android.view.ViewGroup;import android.widget.FrameLayout;import android.widget.TextView;/** * Created by LiuZhen on 2017/7/8. */public class UpdateProgressBar extends FrameLayout {  private TextView tv_progress;  private int width;  private ViewGroup.LayoutParams params;  /**   * The progress text offset.   */  private int mOffset;  /**   * The progress text size.   */  private float mTextSize;  /**   * The progress text color.   */  private int mTextColor;  private float default_text_size;  /**   * The progress area bar color.   */  private int mReachedBarColor;  /**   * The bar unreached area color.   */  private int mUnreachedBarColor;  private final int default_reached_color = Color.rgb(66, 145, 241);  private final int default_unreached_color = Color.rgb(204, 204, 204);  private final int default_text_color = Color.rgb(66, 145, 241);  public UpdateProgressBar(@NonNull Context context) {    this(context,null);  }  public UpdateProgressBar(@NonNull Context context, @Nullable AttributeSet attrs) {    this(context, attrs,0);  }  public UpdateProgressBar(@NonNull Context context, @Nullable AttributeSet attrs, @AttrRes int defStyleAttr) {    super(context, attrs, defStyleAttr);    init(attrs, defStyleAttr);  }  @Override  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {    int desiredWidth = 100;    int desiredHeight = 100;    int widthMode = MeasureSpec.getMode(widthMeasureSpec);    int widthSize = MeasureSpec.getSize(widthMeasureSpec);    int heightMode = MeasureSpec.getMode(heightMeasureSpec);    int heightSize = MeasureSpec.getSize(heightMeasureSpec);    int height;    //Measure Width    if (widthMode == MeasureSpec.EXACTLY) {      //Must be this size      width = widthSize;    } else if (widthMode == MeasureSpec.AT_MOST) {      //Can't be bigger than...      width = Math.min(desiredWidth, widthSize);    } else {      //Be whatever you want      width = desiredWidth;    }    //Measure Height    if (heightMode == MeasureSpec.EXACTLY) {      //Must be this size      height = heightSize;    } else if (heightMode == MeasureSpec.AT_MOST) {      //Can't be bigger than...      height = Math.min(desiredHeight, heightSize);    } else {      //Be whatever you want      height = desiredHeight;    }    int childCount = getChildCount();    for (int i = 0; i < childCount; i++) {      View child = getChildAt(i);      ViewGroup.LayoutParams lp = child.getLayoutParams();      int childWidthSpec = getChildMeasureSpec(widthMeasureSpec, 0, lp.width);      int childHeightSpec = getChildMeasureSpec(heightMeasureSpec, 0, lp.height);      child.measure(childWidthSpec, childHeightSpec);    }    params = tv_progress.getLayoutParams();    params.width = ViewGroup.LayoutParams.WRAP_CONTENT;    params.height = ViewGroup.LayoutParams.MATCH_PARENT;    tv_progress.setLayoutParams(params);    height = tv_progress.getMeasuredHeight();    //MUST CALL THIS    setMeasuredDimension(width, height);  }  private void init(AttributeSet attrs, int defStyleAttr){    default_text_size = 8;    //load styled attributes.    final TypedArray attributes = getContext().getTheme().obtainStyledAttributes(attrs, R.styleable.UpdateProgressBar,        defStyleAttr, 0);    mTextSize = attributes.getDimension(R.styleable.UpdateProgressBar_update_text_size, default_text_size);    mReachedBarColor = attributes.getResourceId(R.styleable.UpdateProgressBar_update_reached_color, default_reached_color);    mUnreachedBarColor = attributes.getResourceId(R.styleable.UpdateProgressBar_update_unreached_color, default_unreached_color);    mTextColor = attributes.getColor(R.styleable.UpdateProgressBar_update_text_color, default_text_color);    setDefaultProgressBar();    mOffset = px2dip(3);    attributes.recycle();  }  private void setDefaultProgressBar(){    setBackgroundResource(mUnreachedBarColor);    tv_progress = new TextView(getContext());    tv_progress.setTextSize(mTextSize);    tv_progress.setGravity(Gravity.RIGHT | Gravity.CENTER_VERTICAL);    tv_progress.setTextColor(mTextColor);    tv_progress.setLines(1);    tv_progress.setBackgroundResource(mReachedBarColor);    tv_progress.setPadding(0,0,5,1);    tv_progress.setText("0%");    addView(tv_progress);  }  public void setProgress(int progress){    tv_progress.setText(progress+"%");    int proWidth = width*progress/100;    if (tv_progress.getWidth() < proWidth)      params.width = proWidth;//這里不能填充mOffset，因為是橢圓進度條，填充會導致橢圓寬度被進度條覆蓋，導致不美觀    tv_progress.setLayoutParams(params);  }  /**   * 根據手機的分辨率從 dp 的單位 轉成為 px(像素)   */  public int dip2px(Context context, float dpValue) {    final float scale = context.getResources().getDisplayMetrics().density;    return (int) (dpValue * scale + 0.5f);  }  /**   * 根據手機的分辨率從 px(像素) 的單位 轉成為 dp   */  public int px2dip(float pxValue) {    final float scale = getContext().getResources().getDisplayMetrics().density;    return (int) (pxValue / scale + 0.5f);  }  /**   * 將px值轉換為sp值，保證文字大小不變   */  public int px2sp(float pxValue) {    final float fontScale = getContext().getResources().getDisplayMetrics().scaledDensity;    return (int) (pxValue / fontScale + 0.5f);  }  /**   * 將sp值轉換為px值，保證文字大小不變   */  public int sp2px(float spValue) {    final float fontScale = getContext().getResources().getDisplayMetrics().scaledDensity;    return (int) (spValue * fontScale + 0.5f);  }}

<com.progressbar.example.UpdateProgressBar    xmlns:pro="http://schemas.android.com/apk/res-auto"    android:id="@+id/progress"    android:layout_width="match_parent"    android:layout_height="wrap_content"    pro:update_text_size="6sp"    pro:update_text_color="#FFFFFF"    pro:update_unreached_color="@drawable/shape_corner_progressbg"    pro:update_reached_color="@drawable/shape_corner_progressbar"/>

import android.os.Bundle;import android.support.v7.app.ActionBarActivity;import android.support.v7.app.AppCompatActivity;import android.view.Menu;import android.view.MenuItem;import android.widget.Toast;import com.progressbar.NumberProgressBar;import java.util.Timer;import java.util.TimerTask;public class MainActivity extends AppCompatActivity {  private Timer timer;  private UpdateProgressBar progressBar;  private int progress;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    progressBar = (UpdateProgressBar)findViewById(R.id.progress);    timer = new Timer();    timer.schedule(new TimerTask() {      @Override      public void run() {        runOnUiThread(new Runnable() {          @Override          public void run() {            progress++;            progressBar.setProgress(progress);            if(progress == 100) {              Toast.makeText(getApplicationContext(), getString(R.string.finish), Toast.LENGTH_SHORT).show();//              progress = 0;//              progressBar.setProgress(0);              timer.cancel();            }          }        });      }    }, 1000, 100);  }  @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 boolean onOptionsItemSelected(MenuItem item) {    // Handle action bar item clicks here. The action bar will    // automatically handle clicks on the Home/Up button, so long    // as you specify a parent activity in AndroidManifest.xml.    int id = item.getItemId();    if (id == R.id.action_settings) {      return true;    }    return super.onOptionsItemSelected(item);  }  @Override  protected void onDestroy() {    super.onDestroy();    timer.cancel();  }}

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">  <solid android:color="#4984f2"/>  <gradient    android:startColor="#4984f2"    android:endColor="#000" />  <corners    android:topLeftRadius="15dp"    android:topRightRadius="15dp"    android:bottomLeftRadius="15dp"    android:bottomRightRadius="15dp"/></shape>

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">  <solid android:color="#dadada"/>  <gradient  android:startColor="#FFF"  android:endColor="#000" />  <corners    android:topLeftRadius="15dp"    android:topRightRadius="15dp"    android:bottomLeftRadius="15dp"    android:bottomRightRadius="15dp"/></shape>