android.widget.Toast#setText ( )源码实例Demo

/**
 * Implementation of makeText that actually shows the message.
 */
@Implementation
@SuppressLint("ShowToast")
public static Toast makeText(Context context, CharSequence text, int duration) {

  LinearLayout layout = new LinearLayout(context);
  layout.setLayoutParams(
      new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

  TextView messageView = new TextView(context);
  layout.setLayoutParams(
      new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
  messageView.setId(android.R.id.message);

  layout.addView(messageView);

  Toast toast = new Toast(context);
  toast.setView(layout);
  toast.setDuration(duration);
  toast.setText(text);
  return toast;
}
 

private static void show(Context context, String message, int duration) {
    Toast toast = getToast(context);
    if (toast != null) {
        toast.setText(message);
        toast.setDuration(duration);
        toast.show();
    }
}
 

private static void show(Context context, @StringRes int messageRes, int duration) {
    Toast toast = getToast(context);
    if (toast != null) {
        toast.setText(messageRes);
        toast.setDuration(duration);
        toast.show();
    }
}
 

@SuppressLint("ShowToast")
public static void showToast(String content) {
    DialogUtils.checkMainThread();
    checkContext();
    if (!DialogUtils.checkNull(mToast)) {
        mToast.get().cancel();
    }
    Toast toast = Toast.makeText(mApp, "", Toast.LENGTH_SHORT);
    toast.setText(content);
    toast.show();
    mToast = new SoftReference<>(toast);
}
 

/**
 * Display a Toast with information about the application.
 *
 * @param packageManager usually retrieved by getPackageManager()
 * @param packageName    usually retrieved by getPackageName()
 */
void createAboutToast(final PackageManager packageManager, final String packageName, final Toast toast, final Context mContext) {
    try {
        final PackageInfo pInfo = packageManager.getPackageInfo(packageName, 0);
        toast.setText(mContext.getString(R.string.toast_version) + " " + pInfo.versionName
                + mContext.getString(R.string.toast_createdBy));
        toast.show();
    } catch (NameNotFoundException e) {
        toast.setText(R.string.toast_errorVersion);
        toast.show();
    }
}
 

private final void doShowToast(Context context, String toast, int length) {
    try {
        Toast t = getToast(context);
        t.setText(toast);
        t.setDuration(length);
        t.show();
    } catch (Exception e) {
        Toast.makeText(context, toast, length).show();
    }
}
 

/**
 * toast兼容适配
 *
 * @param context  {@link Context}
 * @param text     文本信息
 * @param isLong   是否是持续时间较长的toast
 * @param isCenter 是否显示在中心位置
 */
private static void toastCompat(Context context, CharSequence text, boolean isLong, boolean isCenter) {
    boolean isMI = SpecialSupport.isMIUI();
    //MIUI的Toast在文本前面添加应用名称很不合理，因为Toast显示时间有限，需要尽快让用户注意最重要的内容
    Toast toast = Toast.makeText(context.getApplicationContext(), isMI ? null : text, isLong ? Toast.LENGTH_LONG : Toast.LENGTH_SHORT);
    if (isMI) toast.setText(text);
    if (isCenter) toast.setGravity(Gravity.CENTER, 0, 0);
    fixBadTokenException(context, toast);
    toast.show();
}
 

/**
 * @param message
 */
public static void showToast(int message, Toast mToast, Context context) {
    if (mToast == null) {
        mToast = Toast.makeText(context, "", Toast.LENGTH_SHORT);
    }
    mToast.setText(context.getString(message));
    mToast.show();
}
 

/**
 * BdToastCustom constucts
 * @param context   context
 * @param text      text
 * @param time      time
 */
private TamicWindowManager(Context context, String text, double time){
	wdm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
	timer = new Timer();

	// mView = LayoutInflater.from(context).inflate(R.layout.activity_loading, null);
	mView = new TamcWaitingView(context);
	Toast toast = new Toast(context);
	toast.setDuration(Toast.LENGTH_SHORT);
	toast.setMargin(0, 0);
	toast.setGravity(Gravity.CENTER, 0, 0);
	toast.setView(mView);
	toast.setText(text);

	params = new WindowManager.LayoutParams();
	params.height = WindowManager.LayoutParams.MATCH_PARENT;
	params.width = WindowManager.LayoutParams.MATCH_PARENT;
	params.format = PixelFormat.TRANSLUCENT;
	params.windowAnimations = toast.getView().getAnimation().INFINITE;
	params.type = WindowManager.LayoutParams.TYPE_TOAST;
	params.setTitle("Toast");
	params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
			| WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
			| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
	params.gravity = Gravity.CENTER_HORIZONTAL | Gravity.CENTER;
	params.y = -30;

	this.time = time;
}
 

private static Toast makeNormalToast(Context context, CharSequence text, int duration) {
    @SuppressLint("ShowToast")
    Toast toast = Toast.makeText(context, "", duration);
    toast.setText(text);
    return toast;
}
 

/**
 * 根据字符串获取toast
 * 
 * @param ctx
 *            上下文
 * @param msg
 *            字符串
 * @return Toast对象
 */
public static Toast getToast(Context ctx, String msg) {
    Toast mToast = Toast.makeText(ctx, msg, Toast.LENGTH_SHORT);
    mToast.setText(msg);
    mToast.setGravity(Gravity.BOTTOM | Gravity.CENTER, 0, 20);
    mToast.setDuration(Toast.LENGTH_SHORT);
    return mToast;
}