下面列出了android.widget.TextView#invalidate ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* TextView alignment setter.
*
* @param alignment one of {@link Component#ALIGNMENT_NORMAL},
* {@link Component#ALIGNMENT_CENTER} or
* {@link Component#ALIGNMENT_OPPOSITE}
* @param centerVertically whether the text should be centered vertically
*/
public static void setAlignment(TextView textview, int alignment, boolean centerVertically) {
int horizontalGravity;
switch (alignment) {
default:
throw new IllegalArgumentException();
case Component.ALIGNMENT_NORMAL:
horizontalGravity = Gravity.LEFT;
break;
case Component.ALIGNMENT_CENTER:
horizontalGravity = Gravity.CENTER_HORIZONTAL;
break;
case Component.ALIGNMENT_OPPOSITE:
horizontalGravity = Gravity.RIGHT;
break;
}
int verticalGravity = centerVertically ? Gravity.CENTER_VERTICAL : Gravity.TOP;
textview.setGravity(horizontalGravity | verticalGravity);
textview.invalidate();
}
@Override
public void onAnimationUpdate(ValueAnimator animation) {
// No need for synchronization as this always run on main thread anyway
TextView v = textView.get();
if (v != null) {
if (isAttachedToHierarchy(v)) {
shift = (int) animation.getAnimatedValue();
v.invalidate();
} else {
animation.setCurrentPlayTime(0);
animation.start();
}
} else {
// The textview has been destroyed and teardown() hasn't been called
teardown();
Log.e("JumpingBeans", "!!! Remember to call JumpingBeans.stopJumping() when appropriate !!!");
}
}
@Override
public void onAnimationUpdate(ValueAnimator animation) {
// No need for synchronization as this always run on main thread anyway
TextView v = textView.get();
if (v != null) {
if (isAttachedToHierarchy(v)) {
shift = (int) animation.getAnimatedValue();
v.invalidate();
} else {
animation.setCurrentPlayTime(0);
animation.start();
}
} else {
// The textview has been destroyed and teardown() hasn't been called
teardown();
if (BuildConfig.DEBUG) {
Log.e("JumpingBeans", "!!! Remember to call JumpingBeans.stopJumping() when appropriate !!!");
}
}
}
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
TextView tv = (TextView) findViewById(R.id.tv);
Gson gson = new Gson();
Cart cart = buildCart();
StringBuilder sb = new StringBuilder();
sb.append("Gson.toJson() example: \n");
sb.append(" Cart Object: ").append(cart).append("\n");
sb.append(" Cart JSON: ").append(gson.toJson(cart)).append("\n");
sb.append("\n\nGson.fromJson() example: \n");
String json = "{buyer:'Happy Camper',creditCard:'4111-1111-1111-1111',"
+ "lineItems:[{name:'nails',priceInMicros:100000,quantity:100,currencyCode:'USD'}]}";
sb.append("Cart JSON: ").append(json).append("\n");
sb.append("Cart Object: ").append(gson.fromJson(json, Cart.class)).append("\n");
tv.setText(sb.toString());
tv.invalidate();
}
@Override
public void onAnimationUpdate(ValueAnimator animation) {
// No need for synchronization as this always run on main thread anyway
TextView v = textView.get();
if (v != null) {
if (isAttachedToHierarchy(v)) {
shift = (int) animation.getAnimatedValue();
v.invalidate();
} else {
animation.setCurrentPlayTime(0);
animation.start();
}
} else {
// The textview has been destroyed and teardown() hasn't been called
teardown();
Logs.e("JumpingBeans", "!!! Remember to call JumpingBeans.stopJumping() when appropriate !!!");
}
}
/**
* 给Dialog设置提示信息
*
* @param message
*/
public void setMessage(CharSequence message) {
if (message != null && message.length() > 0) {
findViewById(R.id.message).setVisibility(View.VISIBLE);
TextView txt = (TextView) findViewById(R.id.message);
txt.setText(message);
txt.invalidate();
}
}
private void refreshPeakLabel(double maxAmpFreq, double maxAmpDB) {
textPeak.setLength(0);
textPeak.append(activity.getString(R.string.text_peak));
SBNumFormat.fillInNumFixedWidthPositive(textPeak, maxAmpFreq, 5, 1);
textPeak.append("Hz(");
AnalyzerUtil.freq2Cent(textPeak, maxAmpFreq, " ");
textPeak.append(") ");
SBNumFormat.fillInNumFixedWidth(textPeak, maxAmpDB, 3, 1);
textPeak.append("dB");
textPeak.getChars(0, Math.min(textPeak.length(), textPeakChar.length), textPeakChar, 0);
TextView tv = (TextView) activity.findViewById(R.id.textview_peak);
tv.setText(textPeakChar, 0, textPeakChar.length);
tv.invalidate();
}
public static void setGradient(TextView textView, final int[] colorBoxes, final float[] position, final GradientAngle gradientAngle) {
AngleCoordinate ac = AngleCoordinate.getAngleCoordinate(gradientAngle, textView.getWidth(), textView.getHeight());
LinearGradient linearGradient = new LinearGradient(ac.x1, ac.y1, ac.x2, ac.y2,
colorBoxes,
position,
Shader.TileMode.REPEAT);
textView.invalidate();
textView.getPaint().setShader(linearGradient);
}
@Override public void onResourceReady(GlideDrawable resource, GlideAnimation<? super GlideDrawable> glideAnimation) {
if (container != null && container.get() != null) {
TextView textView = container.get();
float width;
float height;
if (resource.getIntrinsicWidth() >= this.width) {
float downScale = (float) resource.getIntrinsicWidth() / this.width;
width = (float) (resource.getIntrinsicWidth() / downScale / 1.3);
height = (float) (resource.getIntrinsicHeight() / downScale / 1.3);
} else {
float multiplier = (float) this.width / resource.getIntrinsicWidth();
width = (float) resource.getIntrinsicWidth() * multiplier;
height = (float) resource.getIntrinsicHeight() * multiplier;
}
Rect rect = new Rect(0, 0, Math.round(width), Math.round(height));
resource.setBounds(rect);
urlDrawable.setBounds(rect);
urlDrawable.setDrawable(resource);
if (resource.isAnimated() && !PrefGetter.isGistDisabled()) {
urlDrawable.setCallback((Drawable.Callback) textView.getTag(R.id.drawable_callback));
resource.setLoopCount(GlideDrawable.LOOP_FOREVER);
resource.start();
}
textView.setText(textView.getText());
textView.invalidate();
}
}
/**
* 给Dialog设置提示信息
*
* @param message 需要显示的信息
*/
public void setMessage(CharSequence message) {
if (message != null && message.length() > 0) {
findViewById(R.id.message).setVisibility(View.VISIBLE);
TextView txt = (TextView) findViewById(R.id.message);
txt.setText(message);
txt.invalidate();
}
}
private void refreshRMSLabel(double dtRMSFromFT) {
textRMS.setLength(0);
textRMS.append("RMS:dB \n");
SBNumFormat.fillInNumFixedWidth(textRMS, 20*Math.log10(dtRMSFromFT), 3, 1);
textRMS.getChars(0, Math.min(textRMS.length(), textRMSChar.length), textRMSChar, 0);
TextView tv = (TextView) activity.findViewById(R.id.textview_RMS);
tv.setText(textRMSChar, 0, textRMSChar.length);
tv.invalidate();
}
public void updateChildState(DownloadEntity entity) {
Integer i = mPosition.get(entity.getFilePath());
if (i == null) return;
int position = i;
if (position != -1) {
TextView child = ((TextView) getChildAt(position));
if (entity.isComplete()) {
child.setText(entity.getFileName() + " | " + getResources().getText(R.string.complete));
} else {
int p = getPercent(entity);
child.setText(entity.getFileName() + ": " + p + "%" + " | " + entity.getConvertSpeed());
}
child.invalidate();
}
}
@Override
public void invalidateDrawable(@NonNull Drawable who) {
TextView textView = textViewWeakReference.get();
if (textView != null) {
textView.invalidate();
} else {
recycle();
}
}
public void setMessage(CharSequence message) {
if(message != null && message.length() > 0) {
findViewById(context.getResources().getIdentifier("message", "id", context.getPackageName())).setVisibility(View.VISIBLE);
TextView txt = (TextView)findViewById(context.getResources().getIdentifier("message", "id", context.getPackageName()));
txt.setText(message);
txt.invalidate();
}
}
public void setMessage(CharSequence message) {
if(message != null && message.length() > 0) {
findViewById(context.getResources().getIdentifier("message", "id", context.getPackageName())).setVisibility(View.VISIBLE);
TextView txt = (TextView)findViewById(context.getResources().getIdentifier("message", "id", context.getPackageName()));
txt.setText(message);
txt.invalidate();
}
}
@Override
public void update() {
TextView tv = target.get();
if (tv.getTag(R.string.atom_ui_title_add_emotion) != null)
tv.invalidate();
}
private void updateAnimationFor(@NonNull ValueAnimator animation, @NonNull TextView v) {
if (isAttachedToHierarchy(v)) {
shift = (int) animation.getAnimatedValue();
v.invalidate();
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState, R.layout.sniff_activity);
setBarTitle(Html.fromHtml("<b>" + getString(R.string.sniffer) + "</b> - <small>"
+ AppContext.getTarget().getIp() + "</small>"));
headerView = findViewById(R.id.header_view);
fileSizeText = (TextView) findViewById(R.id.header_text);
tcpdumpCheckBox = (CheckBox) findViewById(R.id.tcpdump_check_box);
handler = new Handler();
updateRunnable = new Runnable() {
@Override
public void run() {
File file = new File(AppContext.getStoragePath() + "/"
+ SnifferService.sniffer_file_name);
if (file.exists()) {
fileSizeText.setText(getString(
R.string.already_sniffer_data,
file.length() / (1000 * 1000f)));
fileSizeText.invalidate();
}
handler.postDelayed(this, 1000);
}
};
if (AppContext.isTcpdumpRunning) {
tcpdumpCheckBox.setChecked(true);
headerView.setVisibility(View.VISIBLE);
handler.post(updateRunnable);
} else {
tcpdumpCheckBox.setChecked(false);
}
tcpdumpCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
Intent intent = new Intent(SniffActivity.this, SnifferService.class);
if (isChecked) {
headerView.setVisibility(View.VISIBLE);
startService(intent);
handler.post(updateRunnable);
} else {
if (handler != null && updateRunnable != null) {
handler.removeCallbacks(updateRunnable);
}
Toast.makeText(SniffActivity.this,
getString(R.string.saved_in,
AppContext.getStoragePath()
+ "/"
+ SnifferService.sniffer_file_name),
Toast.LENGTH_LONG).show();
stopService(intent);
headerView.setVisibility(View.GONE);
fileSizeText.setText("");
}
}
});
}
/**
* {@link TextView} background color setter. Generally, the caller will
* not pass {@link Component#COLOR_DEFAULT}, instead substituting in the
* appropriate color.
*
* @param textview text view instance
* @param argb background RGB color with alpha
*/
public static void setBackgroundColor(TextView textview, int argb) {
textview.setBackgroundColor(argb);
textview.invalidate();
}
/**
* Sets the text color for a {@link TextView}.
*
* @param textview text view instance
* @param argb text RGB color with alpha
*/
public static void setTextColor(TextView textview, int argb) {
textview.setTextColor(argb);
textview.invalidate();
}